Home / 429,985,152,031.60-644,977,728,047.40-209,834,523,679.60

Finding the Fourth Proportional to 429,985,152,031.60, 644,977,728,047.40 and 209,834,523,679.60

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Solution

The fourth proportional to 429,985,152,031.60, 644,977,728,047.40 and 209,834,523,679.60 is: 314,751,785,519.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,985,152,031.60 : 644,977,728,047.40 = 209,834,523,679.60 : x
  2. Step 2: Convert to fraction form
    429,985,152,031.60/644,977,728,047.40 = 209,834,523,679.60/x
  3. Step 3: Cross multiply
    429,985,152,031.60x = 644,977,728,047.40 × 209,834,523,679.60
  4. Step 4: Simplify right side
    429,985,152,031.60x = 135,338,594,348,776,778,891,264
  5. Step 5: Solve for x
    x = 135,338,594,348,776,778,891,264/429,985,152,031.60
  6. Step 6: Final answer
    x = 314,751,785,519.40

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.