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Finding the Fourth Proportional to 186.84, 257.04 and 143.10

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Solution

The fourth proportional to 186.84, 257.04 and 143.10 is: 196.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.84 : 257.04 = 143.10 : x
  2. Step 2: Convert to fraction form
    186.84/257.04 = 143.10/x
  3. Step 3: Cross multiply
    186.84x = 257.04 × 143.10
  4. Step 4: Simplify right side
    186.84x = 36,782.42
  5. Step 5: Solve for x
    x = 36,782.42/186.84
  6. Step 6: Final answer
    x = 196.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.