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Finding the Fourth Proportional to 64.69, 88.63 and 62.39

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Solution

The fourth proportional to 64.69, 88.63 and 62.39 is: 85.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.69 : 88.63 = 62.39 : x
  2. Step 2: Convert to fraction form
    64.69/88.63 = 62.39/x
  3. Step 3: Cross multiply
    64.69x = 88.63 × 62.39
  4. Step 4: Simplify right side
    64.69x = 5,529.69
  5. Step 5: Solve for x
    x = 5,529.69/64.69
  6. Step 6: Final answer
    x = 85.48

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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.