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Finding the Fourth Proportional to 58.53, 80.69 and 56.73

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Solution

The fourth proportional to 58.53, 80.69 and 56.73 is: 78.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.53 : 80.69 = 56.73 : x
  2. Step 2: Convert to fraction form
    58.53/80.69 = 56.73/x
  3. Step 3: Cross multiply
    58.53x = 80.69 × 56.73
  4. Step 4: Simplify right side
    58.53x = 4,577.60
  5. Step 5: Solve for x
    x = 4,577.60/58.53
  6. Step 6: Final answer
    x = 78.21

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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.