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Finding the Fourth Proportional to 987.57, 1,481.66 and 294.27

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Solution

The fourth proportional to 987.57, 1,481.66 and 294.27 is: 441.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    987.57 : 1,481.66 = 294.27 : x
  2. Step 2: Convert to fraction form
    987.57/1,481.66 = 294.27/x
  3. Step 3: Cross multiply
    987.57x = 1,481.66 × 294.27
  4. Step 4: Simplify right side
    987.57x = 436,008.09
  5. Step 5: Solve for x
    x = 436,008.09/987.57
  6. Step 6: Final answer
    x = 441.50

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Double scale
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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.