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Finding the Fourth Proportional to 372.62, 514.17 and 313.40

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Solution

The fourth proportional to 372.62, 514.17 and 313.40 is: 432.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.62 : 514.17 = 313.40 : x
  2. Step 2: Convert to fraction form
    372.62/514.17 = 313.40/x
  3. Step 3: Cross multiply
    372.62x = 514.17 × 313.40
  4. Step 4: Simplify right side
    372.62x = 161,142.16
  5. Step 5: Solve for x
    x = 161,142.16/372.62
  6. Step 6: Final answer
    x = 432.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.