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Finding the Fourth Proportional to 372.97, 561.71 and 315.60

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Solution

The fourth proportional to 372.97, 561.71 and 315.60 is: 475.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.97 : 561.71 = 315.60 : x
  2. Step 2: Convert to fraction form
    372.97/561.71 = 315.60/x
  3. Step 3: Cross multiply
    372.97x = 561.71 × 315.60
  4. Step 4: Simplify right side
    372.97x = 177,275.68
  5. Step 5: Solve for x
    x = 177,275.68/372.97
  6. Step 6: Final answer
    x = 475.31

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.