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Finding the Fourth Proportional to 499,061.80, 747,426.30 and 489,039.40

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Solution

The fourth proportional to 499,061.80, 747,426.30 and 489,039.40 is: 732,416.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,061.80 : 747,426.30 = 489,039.40 : x
  2. Step 2: Convert to fraction form
    499,061.80/747,426.30 = 489,039.40/x
  3. Step 3: Cross multiply
    499,061.80x = 747,426.30 × 489,039.40
  4. Step 4: Simplify right side
    499,061.80x = 365,520,909,296.22
  5. Step 5: Solve for x
    x = 365,520,909,296.22/499,061.80
  6. Step 6: Final answer
    x = 732,416.12

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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.