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Finding the Fourth Proportional to 412,840.70, 619,261.05 and 132,386.30

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Solution

The fourth proportional to 412,840.70, 619,261.05 and 132,386.30 is: 198,579.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,840.70 : 619,261.05 = 132,386.30 : x
  2. Step 2: Convert to fraction form
    412,840.70/619,261.05 = 132,386.30/x
  3. Step 3: Cross multiply
    412,840.70x = 619,261.05 × 132,386.30
  4. Step 4: Simplify right side
    412,840.70x = 81,981,679,143.62
  5. Step 5: Solve for x
    x = 81,981,679,143.62/412,840.70
  6. Step 6: Final answer
    x = 198,579.45

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Similar ratio
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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.