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Finding the Fourth Proportional to 520,456.96, 780,685.44 and 126,472.96

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Solution

The fourth proportional to 520,456.96, 780,685.44 and 126,472.96 is: 189,709.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,456.96 : 780,685.44 = 126,472.96 : x
  2. Step 2: Convert to fraction form
    520,456.96/780,685.44 = 126,472.96/x
  3. Step 3: Cross multiply
    520,456.96x = 780,685.44 × 126,472.96
  4. Step 4: Simplify right side
    520,456.96x = 98,735,598,425.70
  5. Step 5: Solve for x
    x = 98,735,598,425.70/520,456.96
  6. Step 6: Final answer
    x = 189,709.44

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Double scale
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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.