Home / 1,398,815,999.40-2,098,223,999.10-429,341,644.20

Finding the Fourth Proportional to 1,398,815,999.40, 2,098,223,999.10 and 429,341,644.20

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Solution

The fourth proportional to 1,398,815,999.40, 2,098,223,999.10 and 429,341,644.20 is: 644,012,466.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398,815,999.40 : 2,098,223,999.10 = 429,341,644.20 : x
  2. Step 2: Convert to fraction form
    1,398,815,999.40/2,098,223,999.10 = 429,341,644.20/x
  3. Step 3: Cross multiply
    1,398,815,999.40x = 2,098,223,999.10 × 429,341,644.20
  4. Step 4: Simplify right side
    1,398,815,999.40x = 900,854,941,673,493,248
  5. Step 5: Solve for x
    x = 900,854,941,673,493,248/1,398,815,999.40
  6. Step 6: Final answer
    x = 644,012,466.30

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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.