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Finding the Fourth Proportional to 57.48, 79.26 and 45.20

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Solution

The fourth proportional to 57.48, 79.26 and 45.20 is: 62.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.48 : 79.26 = 45.20 : x
  2. Step 2: Convert to fraction form
    57.48/79.26 = 45.20/x
  3. Step 3: Cross multiply
    57.48x = 79.26 × 45.20
  4. Step 4: Simplify right side
    57.48x = 3,582.55
  5. Step 5: Solve for x
    x = 3,582.55/57.48
  6. Step 6: Final answer
    x = 62.33

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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.