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Finding the Fourth Proportional to 372.56, 557.42 and 320.48

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Solution

The fourth proportional to 372.56, 557.42 and 320.48 is: 479.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.56 : 557.42 = 320.48 : x
  2. Step 2: Convert to fraction form
    372.56/557.42 = 320.48/x
  3. Step 3: Cross multiply
    372.56x = 557.42 × 320.48
  4. Step 4: Simplify right side
    372.56x = 178,641.96
  5. Step 5: Solve for x
    x = 178,641.96/372.56
  6. Step 6: Final answer
    x = 479.50

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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.