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Finding the Fourth Proportional to 499,139.80, 747,543.30 and 489,117.40

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Solution

The fourth proportional to 499,139.80, 747,543.30 and 489,117.40 is: 732,533.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,139.80 : 747,543.30 = 489,117.40 : x
  2. Step 2: Convert to fraction form
    499,139.80/747,543.30 = 489,117.40/x
  3. Step 3: Cross multiply
    499,139.80x = 747,543.30 × 489,117.40
  4. Step 4: Simplify right side
    499,139.80x = 365,636,435,283.42
  5. Step 5: Solve for x
    x = 365,636,435,283.42/499,139.80
  6. Step 6: Final answer
    x = 732,533.12

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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.