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Finding the Fourth Proportional to 395.76, 591.92 and 314.16

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Solution

The fourth proportional to 395.76, 591.92 and 314.16 is: 469.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.76 : 591.92 = 314.16 : x
  2. Step 2: Convert to fraction form
    395.76/591.92 = 314.16/x
  3. Step 3: Cross multiply
    395.76x = 591.92 × 314.16
  4. Step 4: Simplify right side
    395.76x = 185,957.59
  5. Step 5: Solve for x
    x = 185,957.59/395.76
  6. Step 6: Final answer
    x = 469.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.