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Finding the Fourth Proportional to 278,812.59, 418,197.38 and 89,292.80

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Solution

The fourth proportional to 278,812.59, 418,197.38 and 89,292.80 is: 133,932.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,812.59 : 418,197.38 = 89,292.80 : x
  2. Step 2: Convert to fraction form
    278,812.59/418,197.38 = 89,292.80/x
  3. Step 3: Cross multiply
    278,812.59x = 418,197.38 × 89,292.80
  4. Step 4: Simplify right side
    278,812.59x = 37,342,012,475.41
  5. Step 5: Solve for x
    x = 37,342,012,475.41/278,812.59
  6. Step 6: Final answer
    x = 133,932.30

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1.5x scale

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.