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Finding the Fourth Proportional to 186.15, 279.01 and 140.35

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Solution

The fourth proportional to 186.15, 279.01 and 140.35 is: 210.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.15 : 279.01 = 140.35 : x
  2. Step 2: Convert to fraction form
    186.15/279.01 = 140.35/x
  3. Step 3: Cross multiply
    186.15x = 279.01 × 140.35
  4. Step 4: Simplify right side
    186.15x = 39,158.70
  5. Step 5: Solve for x
    x = 39,158.70/186.15
  6. Step 6: Final answer
    x = 210.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.