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Finding the Fourth Proportional to 60.69, 90.94 and 28.17

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Solution

The fourth proportional to 60.69, 90.94 and 28.17 is: 42.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.69 : 90.94 = 28.17 : x
  2. Step 2: Convert to fraction form
    60.69/90.94 = 28.17/x
  3. Step 3: Cross multiply
    60.69x = 90.94 × 28.17
  4. Step 4: Simplify right side
    60.69x = 2,561.71
  5. Step 5: Solve for x
    x = 2,561.71/60.69
  6. Step 6: Final answer
    x = 42.21

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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.