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Finding the Fourth Proportional to 908.60, 1,253.96 and 572.76

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Solution

The fourth proportional to 908.60, 1,253.96 and 572.76 is: 790.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.60 : 1,253.96 = 572.76 : x
  2. Step 2: Convert to fraction form
    908.60/1,253.96 = 572.76/x
  3. Step 3: Cross multiply
    908.60x = 1,253.96 × 572.76
  4. Step 4: Simplify right side
    908.60x = 718,218.13
  5. Step 5: Solve for x
    x = 718,218.13/908.60
  6. Step 6: Final answer
    x = 790.47

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.