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Finding the Fourth Proportional to 372.13, 561.53 and 357.15

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Solution

The fourth proportional to 372.13, 561.53 and 357.15 is: 538.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.13 : 561.53 = 357.15 : x
  2. Step 2: Convert to fraction form
    372.13/561.53 = 357.15/x
  3. Step 3: Cross multiply
    372.13x = 561.53 × 357.15
  4. Step 4: Simplify right side
    372.13x = 200,546.74
  5. Step 5: Solve for x
    x = 200,546.74/372.13
  6. Step 6: Final answer
    x = 538.92

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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.