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Finding the Fourth Proportional to 2,092.38, 3,138.81 and 631.62

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Solution

The fourth proportional to 2,092.38, 3,138.81 and 631.62 is: 947.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,092.38 : 3,138.81 = 631.62 : x
  2. Step 2: Convert to fraction form
    2,092.38/3,138.81 = 631.62/x
  3. Step 3: Cross multiply
    2,092.38x = 3,138.81 × 631.62
  4. Step 4: Simplify right side
    2,092.38x = 1,982,535.17
  5. Step 5: Solve for x
    x = 1,982,535.17/2,092.38
  6. Step 6: Final answer
    x = 947.50

Related Problems

Find fourth proportional to 1,046.19, 1,569.41 and 315.81
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.