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Finding the Fourth Proportional to 627.38, 866.10 and 487.19

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Solution

The fourth proportional to 627.38, 866.10 and 487.19 is: 672.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.38 : 866.10 = 487.19 : x
  2. Step 2: Convert to fraction form
    627.38/866.10 = 487.19/x
  3. Step 3: Cross multiply
    627.38x = 866.10 × 487.19
  4. Step 4: Simplify right side
    627.38x = 421,955.26
  5. Step 5: Solve for x
    x = 421,955.26/627.38
  6. Step 6: Final answer
    x = 672.57

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1.5x scale

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.