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Finding the Fourth Proportional to 639.28, 954.44 and 566.56

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Solution

The fourth proportional to 639.28, 954.44 and 566.56 is: 845.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.28 : 954.44 = 566.56 : x
  2. Step 2: Convert to fraction form
    639.28/954.44 = 566.56/x
  3. Step 3: Cross multiply
    639.28x = 954.44 × 566.56
  4. Step 4: Simplify right side
    639.28x = 540,747.53
  5. Step 5: Solve for x
    x = 540,747.53/639.28
  6. Step 6: Final answer
    x = 845.87

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.