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Finding the Fourth Proportional to 675.90, 1,013.85 and 188.96

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Solution

The fourth proportional to 675.90, 1,013.85 and 188.96 is: 283.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.90 : 1,013.85 = 188.96 : x
  2. Step 2: Convert to fraction form
    675.90/1,013.85 = 188.96/x
  3. Step 3: Cross multiply
    675.90x = 1,013.85 × 188.96
  4. Step 4: Simplify right side
    675.90x = 191,572.03
  5. Step 5: Solve for x
    x = 191,572.03/675.90
  6. Step 6: Final answer
    x = 283.43

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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.