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Finding the Fourth Proportional to 526.62, 727.56 and 402.78

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Solution

The fourth proportional to 526.62, 727.56 and 402.78 is: 556.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.62 : 727.56 = 402.78 : x
  2. Step 2: Convert to fraction form
    526.62/727.56 = 402.78/x
  3. Step 3: Cross multiply
    526.62x = 727.56 × 402.78
  4. Step 4: Simplify right side
    526.62x = 293,046.62
  5. Step 5: Solve for x
    x = 293,046.62/526.62
  6. Step 6: Final answer
    x = 556.47

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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.