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Finding the Fourth Proportional to 57.33, 78.57 and 56.16

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Solution

The fourth proportional to 57.33, 78.57 and 56.16 is: 76.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.33 : 78.57 = 56.16 : x
  2. Step 2: Convert to fraction form
    57.33/78.57 = 56.16/x
  3. Step 3: Cross multiply
    57.33x = 78.57 × 56.16
  4. Step 4: Simplify right side
    57.33x = 4,412.49
  5. Step 5: Solve for x
    x = 4,412.49/57.33
  6. Step 6: Final answer
    x = 76.97

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.