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Finding the Fourth Proportional to 901.97, 1,352.97 and 285.68

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Solution

The fourth proportional to 901.97, 1,352.97 and 285.68 is: 428.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.97 : 1,352.97 = 285.68 : x
  2. Step 2: Convert to fraction form
    901.97/1,352.97 = 285.68/x
  3. Step 3: Cross multiply
    901.97x = 1,352.97 × 285.68
  4. Step 4: Simplify right side
    901.97x = 386,516.47
  5. Step 5: Solve for x
    x = 386,516.47/901.97
  6. Step 6: Final answer
    x = 428.52

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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.