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Finding the Fourth Proportional to 280,610.62, 387,251.14 and 153,294.42

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Solution

The fourth proportional to 280,610.62, 387,251.14 and 153,294.42 is: 211,550.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,610.62 : 387,251.14 = 153,294.42 : x
  2. Step 2: Convert to fraction form
    280,610.62/387,251.14 = 153,294.42/x
  3. Step 3: Cross multiply
    280,610.62x = 387,251.14 × 153,294.42
  4. Step 4: Simplify right side
    280,610.62x = 59,363,438,900.64
  5. Step 5: Solve for x
    x = 59,363,438,900.64/280,610.62
  6. Step 6: Final answer
    x = 211,550.93

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1.5x scale

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.