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Finding the Fourth Proportional to 908.29, 1,253.58 and 515.23

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Solution

The fourth proportional to 908.29, 1,253.58 and 515.23 is: 711.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.29 : 1,253.58 = 515.23 : x
  2. Step 2: Convert to fraction form
    908.29/1,253.58 = 515.23/x
  3. Step 3: Cross multiply
    908.29x = 1,253.58 × 515.23
  4. Step 4: Simplify right side
    908.29x = 645,882.02
  5. Step 5: Solve for x
    x = 645,882.02/908.29
  6. Step 6: Final answer
    x = 711.10

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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.