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Finding the Fourth Proportional to 631.92, 943.28 and 580.56

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Solution

The fourth proportional to 631.92, 943.28 and 580.56 is: 866.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.92 : 943.28 = 580.56 : x
  2. Step 2: Convert to fraction form
    631.92/943.28 = 580.56/x
  3. Step 3: Cross multiply
    631.92x = 943.28 × 580.56
  4. Step 4: Simplify right side
    631.92x = 547,630.64
  5. Step 5: Solve for x
    x = 547,630.64/631.92
  6. Step 6: Final answer
    x = 866.61

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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.