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Finding the Fourth Proportional to 421,951.25, 632,926.88 and 126,463.25

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Solution

The fourth proportional to 421,951.25, 632,926.88 and 126,463.25 is: 189,694.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,951.25 : 632,926.88 = 126,463.25 : x
  2. Step 2: Convert to fraction form
    421,951.25/632,926.88 = 126,463.25/x
  3. Step 3: Cross multiply
    421,951.25x = 632,926.88 × 126,463.25
  4. Step 4: Simplify right side
    421,951.25x = 80,041,990,257.16
  5. Step 5: Solve for x
    x = 80,041,990,257.16/421,951.25
  6. Step 6: Final answer
    x = 189,694.88

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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.