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Finding the Fourth Proportional to 58.56, 87.80 and 34.21

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Solution

The fourth proportional to 58.56, 87.80 and 34.21 is: 51.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.56 : 87.80 = 34.21 : x
  2. Step 2: Convert to fraction form
    58.56/87.80 = 34.21/x
  3. Step 3: Cross multiply
    58.56x = 87.80 × 34.21
  4. Step 4: Simplify right side
    58.56x = 3,003.50
  5. Step 5: Solve for x
    x = 3,003.50/58.56
  6. Step 6: Final answer
    x = 51.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.