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Finding the Fourth Proportional to 287.92, 432.05 and 105.29

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Solution

The fourth proportional to 287.92, 432.05 and 105.29 is: 158.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.92 : 432.05 = 105.29 : x
  2. Step 2: Convert to fraction form
    287.92/432.05 = 105.29/x
  3. Step 3: Cross multiply
    287.92x = 432.05 × 105.29
  4. Step 4: Simplify right side
    287.92x = 45,490.02
  5. Step 5: Solve for x
    x = 45,490.02/287.92
  6. Step 6: Final answer
    x = 158.00

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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.