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Finding the Fourth Proportional to 539,326.20, 809,864.10 and 390,610.20

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Solution

The fourth proportional to 539,326.20, 809,864.10 and 390,610.20 is: 586,548.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,326.20 : 809,864.10 = 390,610.20 : x
  2. Step 2: Convert to fraction form
    539,326.20/809,864.10 = 390,610.20/x
  3. Step 3: Cross multiply
    539,326.20x = 809,864.10 × 390,610.20
  4. Step 4: Simplify right side
    539,326.20x = 316,341,178,073.82
  5. Step 5: Solve for x
    x = 316,341,178,073.82/539,326.20
  6. Step 6: Final answer
    x = 586,548.88

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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.