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Finding the Fourth Proportional to 658,538.80, 987,808.20 and 159,902.80

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Solution

The fourth proportional to 658,538.80, 987,808.20 and 159,902.80 is: 239,854.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,538.80 : 987,808.20 = 159,902.80 : x
  2. Step 2: Convert to fraction form
    658,538.80/987,808.20 = 159,902.80/x
  3. Step 3: Cross multiply
    658,538.80x = 987,808.20 × 159,902.80
  4. Step 4: Simplify right side
    658,538.80x = 157,953,297,042.96
  5. Step 5: Solve for x
    x = 157,953,297,042.96/658,538.80
  6. Step 6: Final answer
    x = 239,854.20

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Half scale
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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.