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Finding the Fourth Proportional to 690.18, 952.15 and 424.39

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Solution

The fourth proportional to 690.18, 952.15 and 424.39 is: 585.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    690.18 : 952.15 = 424.39 : x
  2. Step 2: Convert to fraction form
    690.18/952.15 = 424.39/x
  3. Step 3: Cross multiply
    690.18x = 952.15 × 424.39
  4. Step 4: Simplify right side
    690.18x = 404,082.94
  5. Step 5: Solve for x
    x = 404,082.94/690.18
  6. Step 6: Final answer
    x = 585.47

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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.