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Finding the Fourth Proportional to 58.32, 80.51 and 39.93

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Solution

The fourth proportional to 58.32, 80.51 and 39.93 is: 55.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.32 : 80.51 = 39.93 : x
  2. Step 2: Convert to fraction form
    58.32/80.51 = 39.93/x
  3. Step 3: Cross multiply
    58.32x = 80.51 × 39.93
  4. Step 4: Simplify right side
    58.32x = 3,214.56
  5. Step 5: Solve for x
    x = 3,214.56/58.32
  6. Step 6: Final answer
    x = 55.12

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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.