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Finding the Fourth Proportional to 60.22, 83.06 and 40.78

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Solution

The fourth proportional to 60.22, 83.06 and 40.78 is: 56.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.22 : 83.06 = 40.78 : x
  2. Step 2: Convert to fraction form
    60.22/83.06 = 40.78/x
  3. Step 3: Cross multiply
    60.22x = 83.06 × 40.78
  4. Step 4: Simplify right side
    60.22x = 3,387.19
  5. Step 5: Solve for x
    x = 3,387.19/60.22
  6. Step 6: Final answer
    x = 56.25

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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.