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Finding the Fourth Proportional to 639,374.40, 961,394.40 and 536,731.20

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Solution

The fourth proportional to 639,374.40, 961,394.40 and 536,731.20 is: 807,055.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,374.40 : 961,394.40 = 536,731.20 : x
  2. Step 2: Convert to fraction form
    639,374.40/961,394.40 = 536,731.20/x
  3. Step 3: Cross multiply
    639,374.40x = 961,394.40 × 536,731.20
  4. Step 4: Simplify right side
    639,374.40x = 516,010,369,985.28
  5. Step 5: Solve for x
    x = 516,010,369,985.28/639,374.40
  6. Step 6: Final answer
    x = 807,055.10

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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.