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Finding the Fourth Proportional to 278,572.35, 417,858.53 and 260,857.65

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Solution

The fourth proportional to 278,572.35, 417,858.53 and 260,857.65 is: 391,286.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,572.35 : 417,858.53 = 260,857.65 : x
  2. Step 2: Convert to fraction form
    278,572.35/417,858.53 = 260,857.65/x
  3. Step 3: Cross multiply
    278,572.35x = 417,858.53 × 260,857.65
  4. Step 4: Simplify right side
    278,572.35x = 109,001,592,863.97
  5. Step 5: Solve for x
    x = 109,001,592,863.97/278,572.35
  6. Step 6: Final answer
    x = 391,286.48

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Similar ratio
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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.