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Finding the Fourth Proportional to 187.20, 279.09 and 170.10

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Solution

The fourth proportional to 187.20, 279.09 and 170.10 is: 253.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.20 : 279.09 = 170.10 : x
  2. Step 2: Convert to fraction form
    187.20/279.09 = 170.10/x
  3. Step 3: Cross multiply
    187.20x = 279.09 × 170.10
  4. Step 4: Simplify right side
    187.20x = 47,473.21
  5. Step 5: Solve for x
    x = 47,473.21/187.20
  6. Step 6: Final answer
    x = 253.60

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.