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Finding the Fourth Proportional to 57.58, 79.43 and 40.14

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Solution

The fourth proportional to 57.58, 79.43 and 40.14 is: 55.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.58 : 79.43 = 40.14 : x
  2. Step 2: Convert to fraction form
    57.58/79.43 = 40.14/x
  3. Step 3: Cross multiply
    57.58x = 79.43 × 40.14
  4. Step 4: Simplify right side
    57.58x = 3,188.12
  5. Step 5: Solve for x
    x = 3,188.12/57.58
  6. Step 6: Final answer
    x = 55.37

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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.