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Finding the Fourth Proportional to 185.40, 279.18 and 170.28

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Solution

The fourth proportional to 185.40, 279.18 and 170.28 is: 256.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.40 : 279.18 = 170.28 : x
  2. Step 2: Convert to fraction form
    185.40/279.18 = 170.28/x
  3. Step 3: Cross multiply
    185.40x = 279.18 × 170.28
  4. Step 4: Simplify right side
    185.40x = 47,538.77
  5. Step 5: Solve for x
    x = 47,538.77/185.40
  6. Step 6: Final answer
    x = 256.41

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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.