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Finding the Fourth Proportional to 615.60, 922.68 and 478.44

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Solution

The fourth proportional to 615.60, 922.68 and 478.44 is: 717.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.60 : 922.68 = 478.44 : x
  2. Step 2: Convert to fraction form
    615.60/922.68 = 478.44/x
  3. Step 3: Cross multiply
    615.60x = 922.68 × 478.44
  4. Step 4: Simplify right side
    615.60x = 441,447.02
  5. Step 5: Solve for x
    x = 441,447.02/615.60
  6. Step 6: Final answer
    x = 717.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.