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Finding the Fourth Proportional to 57.53, 79.76 and 56.41

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Solution

The fourth proportional to 57.53, 79.76 and 56.41 is: 78.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.53 : 79.76 = 56.41 : x
  2. Step 2: Convert to fraction form
    57.53/79.76 = 56.41/x
  3. Step 3: Cross multiply
    57.53x = 79.76 × 56.41
  4. Step 4: Simplify right side
    57.53x = 4,499.26
  5. Step 5: Solve for x
    x = 4,499.26/57.53
  6. Step 6: Final answer
    x = 78.21

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.