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Finding the Fourth Proportional to 375.12, 515.72 and 372.78

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Solution

The fourth proportional to 375.12, 515.72 and 372.78 is: 512.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    375.12 : 515.72 = 372.78 : x
  2. Step 2: Convert to fraction form
    375.12/515.72 = 372.78/x
  3. Step 3: Cross multiply
    375.12x = 515.72 × 372.78
  4. Step 4: Simplify right side
    375.12x = 192,248.24
  5. Step 5: Solve for x
    x = 192,248.24/375.12
  6. Step 6: Final answer
    x = 512.50

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.