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Finding the Fourth Proportional to 372.55, 514.62 and 286.30

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Solution

The fourth proportional to 372.55, 514.62 and 286.30 is: 395.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.55 : 514.62 = 286.30 : x
  2. Step 2: Convert to fraction form
    372.55/514.62 = 286.30/x
  3. Step 3: Cross multiply
    372.55x = 514.62 × 286.30
  4. Step 4: Simplify right side
    372.55x = 147,335.71
  5. Step 5: Solve for x
    x = 147,335.71/372.55
  6. Step 6: Final answer
    x = 395.48

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