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Finding the Fourth Proportional to 552.56, 763.29 and 478.85

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Solution

The fourth proportional to 552.56, 763.29 and 478.85 is: 661.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.56 : 763.29 = 478.85 : x
  2. Step 2: Convert to fraction form
    552.56/763.29 = 478.85/x
  3. Step 3: Cross multiply
    552.56x = 763.29 × 478.85
  4. Step 4: Simplify right side
    552.56x = 365,497.60
  5. Step 5: Solve for x
    x = 365,497.60/552.56
  6. Step 6: Final answer
    x = 661.47

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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.