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Finding the Fourth Proportional to 62.59, 86.40 and 43.02

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Solution

The fourth proportional to 62.59, 86.40 and 43.02 is: 59.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.59 : 86.40 = 43.02 : x
  2. Step 2: Convert to fraction form
    62.59/86.40 = 43.02/x
  3. Step 3: Cross multiply
    62.59x = 86.40 × 43.02
  4. Step 4: Simplify right side
    62.59x = 3,716.93
  5. Step 5: Solve for x
    x = 3,716.93/62.59
  6. Step 6: Final answer
    x = 59.39

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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.