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Finding the Fourth Proportional to 627.32, 864.11 and 479.70

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Solution

The fourth proportional to 627.32, 864.11 and 479.70 is: 660.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.32 : 864.11 = 479.70 : x
  2. Step 2: Convert to fraction form
    627.32/864.11 = 479.70/x
  3. Step 3: Cross multiply
    627.32x = 864.11 × 479.70
  4. Step 4: Simplify right side
    627.32x = 414,511.17
  5. Step 5: Solve for x
    x = 414,511.17/627.32
  6. Step 6: Final answer
    x = 660.77

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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.