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Finding the Fourth Proportional to 542,191.64, 812,539.47 and 391,229.06

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Solution

The fourth proportional to 542,191.64, 812,539.47 and 391,229.06 is: 586,303.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,191.64 : 812,539.47 = 391,229.06 : x
  2. Step 2: Convert to fraction form
    542,191.64/812,539.47 = 391,229.06/x
  3. Step 3: Cross multiply
    542,191.64x = 812,539.47 × 391,229.06
  4. Step 4: Simplify right side
    542,191.64x = 317,889,053,061.00
  5. Step 5: Solve for x
    x = 317,889,053,061.00/542,191.64
  6. Step 6: Final answer
    x = 586,303.86

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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.