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Finding the Fourth Proportional to 498,781.57, 687,601.15 and 355,292.50

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Solution

The fourth proportional to 498,781.57, 687,601.15 and 355,292.50 is: 489,792.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,781.57 : 687,601.15 = 355,292.50 : x
  2. Step 2: Convert to fraction form
    498,781.57/687,601.15 = 355,292.50/x
  3. Step 3: Cross multiply
    498,781.57x = 687,601.15 × 355,292.50
  4. Step 4: Simplify right side
    498,781.57x = 244,299,534,200.79
  5. Step 5: Solve for x
    x = 244,299,534,200.79/498,781.57
  6. Step 6: Final answer
    x = 489,792.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.