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Finding the Fourth Proportional to 287.81, 432.13 and 252.17

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Solution

The fourth proportional to 287.81, 432.13 and 252.17 is: 378.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.81 : 432.13 = 252.17 : x
  2. Step 2: Convert to fraction form
    287.81/432.13 = 252.17/x
  3. Step 3: Cross multiply
    287.81x = 432.13 × 252.17
  4. Step 4: Simplify right side
    287.81x = 108,970.22
  5. Step 5: Solve for x
    x = 108,970.22/287.81
  6. Step 6: Final answer
    x = 378.62

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.