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Finding the Fourth Proportional to 499,412.79, 747,790.65 and 390,254.22

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Solution

The fourth proportional to 499,412.79, 747,790.65 and 390,254.22 is: 584,343.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,412.79 : 747,790.65 = 390,254.22 : x
  2. Step 2: Convert to fraction form
    499,412.79/747,790.65 = 390,254.22/x
  3. Step 3: Cross multiply
    499,412.79x = 747,790.65 × 390,254.22
  4. Step 4: Simplify right side
    499,412.79x = 291,828,456,839.04
  5. Step 5: Solve for x
    x = 291,828,456,839.04/499,412.79
  6. Step 6: Final answer
    x = 584,343.18

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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.