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Finding the Fourth Proportional to 58.98, 80.91 and 58.18

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Solution

The fourth proportional to 58.98, 80.91 and 58.18 is: 79.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.98 : 80.91 = 58.18 : x
  2. Step 2: Convert to fraction form
    58.98/80.91 = 58.18/x
  3. Step 3: Cross multiply
    58.98x = 80.91 × 58.18
  4. Step 4: Simplify right side
    58.98x = 4,707.34
  5. Step 5: Solve for x
    x = 4,707.34/58.98
  6. Step 6: Final answer
    x = 79.81

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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.