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Finding the Fourth Proportional to 185.40, 277.78 and 142.84

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Solution

The fourth proportional to 185.40, 277.78 and 142.84 is: 214.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.40 : 277.78 = 142.84 : x
  2. Step 2: Convert to fraction form
    185.40/277.78 = 142.84/x
  3. Step 3: Cross multiply
    185.40x = 277.78 × 142.84
  4. Step 4: Simplify right side
    185.40x = 39,678.10
  5. Step 5: Solve for x
    x = 39,678.10/185.40
  6. Step 6: Final answer
    x = 214.01

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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.