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Finding the Fourth Proportional to 57.45, 79.32 and 39.06

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Solution

The fourth proportional to 57.45, 79.32 and 39.06 is: 53.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.45 : 79.32 = 39.06 : x
  2. Step 2: Convert to fraction form
    57.45/79.32 = 39.06/x
  3. Step 3: Cross multiply
    57.45x = 79.32 × 39.06
  4. Step 4: Simplify right side
    57.45x = 3,098.24
  5. Step 5: Solve for x
    x = 3,098.24/57.45
  6. Step 6: Final answer
    x = 53.93

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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.