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Finding the Fourth Proportional to 562.28, 775.86 and 387.86

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Solution

The fourth proportional to 562.28, 775.86 and 387.86 is: 535.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    562.28 : 775.86 = 387.86 : x
  2. Step 2: Convert to fraction form
    562.28/775.86 = 387.86/x
  3. Step 3: Cross multiply
    562.28x = 775.86 × 387.86
  4. Step 4: Simplify right side
    562.28x = 300,925.06
  5. Step 5: Solve for x
    x = 300,925.06/562.28
  6. Step 6: Final answer
    x = 535.19

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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.