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Finding the Fourth Proportional to 58.30, 80.43 and 38.65

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Solution

The fourth proportional to 58.30, 80.43 and 38.65 is: 53.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.30 : 80.43 = 38.65 : x
  2. Step 2: Convert to fraction form
    58.30/80.43 = 38.65/x
  3. Step 3: Cross multiply
    58.30x = 80.43 × 38.65
  4. Step 4: Simplify right side
    58.30x = 3,108.62
  5. Step 5: Solve for x
    x = 3,108.62/58.30
  6. Step 6: Final answer
    x = 53.32

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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.