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Finding the Fourth Proportional to 631.60, 866.43 and 615.47

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Solution

The fourth proportional to 631.60, 866.43 and 615.47 is: 844.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.60 : 866.43 = 615.47 : x
  2. Step 2: Convert to fraction form
    631.60/866.43 = 615.47/x
  3. Step 3: Cross multiply
    631.60x = 866.43 × 615.47
  4. Step 4: Simplify right side
    631.60x = 533,257.34
  5. Step 5: Solve for x
    x = 533,257.34/631.60
  6. Step 6: Final answer
    x = 844.30

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.