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Finding the Fourth Proportional to 219.48, 302.85 and 140.90

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Solution

The fourth proportional to 219.48, 302.85 and 140.90 is: 194.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.48 : 302.85 = 140.90 : x
  2. Step 2: Convert to fraction form
    219.48/302.85 = 140.90/x
  3. Step 3: Cross multiply
    219.48x = 302.85 × 140.90
  4. Step 4: Simplify right side
    219.48x = 42,673.00
  5. Step 5: Solve for x
    x = 42,673.00/219.48
  6. Step 6: Final answer
    x = 194.43

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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.