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Finding the Fourth Proportional to 901.25, 1,351.88 and 217.25

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Solution

The fourth proportional to 901.25, 1,351.88 and 217.25 is: 325.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.25 : 1,351.88 = 217.25 : x
  2. Step 2: Convert to fraction form
    901.25/1,351.88 = 217.25/x
  3. Step 3: Cross multiply
    901.25x = 1,351.88 × 217.25
  4. Step 4: Simplify right side
    901.25x = 293,695.93
  5. Step 5: Solve for x
    x = 293,695.93/901.25
  6. Step 6: Final answer
    x = 325.88

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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.