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Finding the Fourth Proportional to 953.72, 1,315.42 and 658.52

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Solution

The fourth proportional to 953.72, 1,315.42 and 658.52 is: 908.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.72 : 1,315.42 = 658.52 : x
  2. Step 2: Convert to fraction form
    953.72/1,315.42 = 658.52/x
  3. Step 3: Cross multiply
    953.72x = 1,315.42 × 658.52
  4. Step 4: Simplify right side
    953.72x = 866,230.38
  5. Step 5: Solve for x
    x = 866,230.38/953.72
  6. Step 6: Final answer
    x = 908.26

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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.