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Finding the Fourth Proportional to 690.38, 952.66 and 410.54

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Solution

The fourth proportional to 690.38, 952.66 and 410.54 is: 566.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    690.38 : 952.66 = 410.54 : x
  2. Step 2: Convert to fraction form
    690.38/952.66 = 410.54/x
  3. Step 3: Cross multiply
    690.38x = 952.66 × 410.54
  4. Step 4: Simplify right side
    690.38x = 391,105.04
  5. Step 5: Solve for x
    x = 391,105.04/690.38
  6. Step 6: Final answer
    x = 566.51

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Double scale
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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.