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Finding the Fourth Proportional to 463.61, 640.19 and 353.57

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Solution

The fourth proportional to 463.61, 640.19 and 353.57 is: 488.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.61 : 640.19 = 353.57 : x
  2. Step 2: Convert to fraction form
    463.61/640.19 = 353.57/x
  3. Step 3: Cross multiply
    463.61x = 640.19 × 353.57
  4. Step 4: Simplify right side
    463.61x = 226,349.66
  5. Step 5: Solve for x
    x = 226,349.66/463.61
  6. Step 6: Final answer
    x = 488.23

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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.