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Finding the Fourth Proportional to 615.56, 923.70 and 494.60

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Solution

The fourth proportional to 615.56, 923.70 and 494.60 is: 742.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.56 : 923.70 = 494.60 : x
  2. Step 2: Convert to fraction form
    615.56/923.70 = 494.60/x
  3. Step 3: Cross multiply
    615.56x = 923.70 × 494.60
  4. Step 4: Simplify right side
    615.56x = 456,862.02
  5. Step 5: Solve for x
    x = 456,862.02/615.56
  6. Step 6: Final answer
    x = 742.19

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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.