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Finding the Fourth Proportional to 391,203,031.40, 586,804,547.10 and 361,641,789.80

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Solution

The fourth proportional to 391,203,031.40, 586,804,547.10 and 361,641,789.80 is: 542,462,684.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,203,031.40 : 586,804,547.10 = 361,641,789.80 : x
  2. Step 2: Convert to fraction form
    391,203,031.40/586,804,547.10 = 361,641,789.80/x
  3. Step 3: Cross multiply
    391,203,031.40x = 586,804,547.10 × 361,641,789.80
  4. Step 4: Simplify right side
    391,203,031.40x = 212,213,046,676,022,400
  5. Step 5: Solve for x
    x = 212,213,046,676,022,400/391,203,031.40
  6. Step 6: Final answer
    x = 542,462,684.70

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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.