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Finding the Fourth Proportional to 186.24, 278.96 and 100.80

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Solution

The fourth proportional to 186.24, 278.96 and 100.80 is: 150.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.24 : 278.96 = 100.80 : x
  2. Step 2: Convert to fraction form
    186.24/278.96 = 100.80/x
  3. Step 3: Cross multiply
    186.24x = 278.96 × 100.80
  4. Step 4: Simplify right side
    186.24x = 28,119.17
  5. Step 5: Solve for x
    x = 28,119.17/186.24
  6. Step 6: Final answer
    x = 150.98

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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.