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Finding the Fourth Proportional to 186.81, 278.87 and 174.57

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Solution

The fourth proportional to 186.81, 278.87 and 174.57 is: 260.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.81 : 278.87 = 174.57 : x
  2. Step 2: Convert to fraction form
    186.81/278.87 = 174.57/x
  3. Step 3: Cross multiply
    186.81x = 278.87 × 174.57
  4. Step 4: Simplify right side
    186.81x = 48,682.77
  5. Step 5: Solve for x
    x = 48,682.77/186.81
  6. Step 6: Final answer
    x = 260.60

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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.