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Finding the Fourth Proportional to 55.17, 83.09 and 40.07

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Solution

The fourth proportional to 55.17, 83.09 and 40.07 is: 60.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.17 : 83.09 = 40.07 : x
  2. Step 2: Convert to fraction form
    55.17/83.09 = 40.07/x
  3. Step 3: Cross multiply
    55.17x = 83.09 × 40.07
  4. Step 4: Simplify right side
    55.17x = 3,328.80
  5. Step 5: Solve for x
    x = 3,328.80/55.17
  6. Step 6: Final answer
    x = 60.34

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.