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Finding the Fourth Proportional to 44.90, 61.82 and 40.28

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Solution

The fourth proportional to 44.90, 61.82 and 40.28 is: 55.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    44.90 : 61.82 = 40.28 : x
  2. Step 2: Convert to fraction form
    44.90/61.82 = 40.28/x
  3. Step 3: Cross multiply
    44.90x = 61.82 × 40.28
  4. Step 4: Simplify right side
    44.90x = 2,490.11
  5. Step 5: Solve for x
    x = 2,490.11/44.90
  6. Step 6: Final answer
    x = 55.46

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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.