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Finding the Fourth Proportional to 463.34, 698.48 and 391.70

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Solution

The fourth proportional to 463.34, 698.48 and 391.70 is: 590.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.34 : 698.48 = 391.70 : x
  2. Step 2: Convert to fraction form
    463.34/698.48 = 391.70/x
  3. Step 3: Cross multiply
    463.34x = 698.48 × 391.70
  4. Step 4: Simplify right side
    463.34x = 273,594.62
  5. Step 5: Solve for x
    x = 273,594.62/463.34
  6. Step 6: Final answer
    x = 590.48

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.