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Finding the Fourth Proportional to 498,117.80, 747,396.21 and 261,403.40

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Solution

The fourth proportional to 498,117.80, 747,396.21 and 261,403.40 is: 392,220.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,117.80 : 747,396.21 = 261,403.40 : x
  2. Step 2: Convert to fraction form
    498,117.80/747,396.21 = 261,403.40/x
  3. Step 3: Cross multiply
    498,117.80x = 747,396.21 × 261,403.40
  4. Step 4: Simplify right side
    498,117.80x = 195,371,913,289.87
  5. Step 5: Solve for x
    x = 195,371,913,289.87/498,117.80
  6. Step 6: Final answer
    x = 392,220.30

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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.