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Finding the Fourth Proportional to 278,807.87, 418,176.27 and 89,287.92

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Solution

The fourth proportional to 278,807.87, 418,176.27 and 89,287.92 is: 133,920.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,807.87 : 418,176.27 = 89,287.92 : x
  2. Step 2: Convert to fraction form
    278,807.87/418,176.27 = 89,287.92/x
  3. Step 3: Cross multiply
    278,807.87x = 418,176.27 × 89,287.92
  4. Step 4: Simplify right side
    278,807.87x = 37,338,089,341.66
  5. Step 5: Solve for x
    x = 37,338,089,341.66/278,807.87
  6. Step 6: Final answer
    x = 133,920.50

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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.