Home / 429,440,028.60-644,348,999.70-199,290,646.20

Finding the Fourth Proportional to 429,440,028.60, 644,348,999.70 and 199,290,646.20

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Solution

The fourth proportional to 429,440,028.60, 644,348,999.70 and 199,290,646.20 is: 299,023,658.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,440,028.60 : 644,348,999.70 = 199,290,646.20 : x
  2. Step 2: Convert to fraction form
    429,440,028.60/644,348,999.70 = 199,290,646.20/x
  3. Step 3: Cross multiply
    429,440,028.60x = 644,348,999.70 × 199,290,646.20
  4. Step 4: Simplify right side
    429,440,028.60x = 128,412,728,528,536,608
  5. Step 5: Solve for x
    x = 128,412,728,528,536,608/429,440,028.60
  6. Step 6: Final answer
    x = 299,023,658.66

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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.