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Finding the Fourth Proportional to 526.73, 727.13 and 395.78

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Solution

The fourth proportional to 526.73, 727.13 and 395.78 is: 546.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.73 : 727.13 = 395.78 : x
  2. Step 2: Convert to fraction form
    526.73/727.13 = 395.78/x
  3. Step 3: Cross multiply
    526.73x = 727.13 × 395.78
  4. Step 4: Simplify right side
    526.73x = 287,781.53
  5. Step 5: Solve for x
    x = 287,781.53/526.73
  6. Step 6: Final answer
    x = 546.35

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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.