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Finding the Fourth Proportional to 280,494.46, 387,115.53 and 157,990.84

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Solution

The fourth proportional to 280,494.46, 387,115.53 and 157,990.84 is: 218,046.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,494.46 : 387,115.53 = 157,990.84 : x
  2. Step 2: Convert to fraction form
    280,494.46/387,115.53 = 157,990.84/x
  3. Step 3: Cross multiply
    280,494.46x = 387,115.53 × 157,990.84
  4. Step 4: Simplify right side
    280,494.46x = 61,160,707,761.75
  5. Step 5: Solve for x
    x = 61,160,707,761.75/280,494.46
  6. Step 6: Final answer
    x = 218,046.05

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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.