Home / 930.24-1,394.82-280.80

Finding the Fourth Proportional to 930.24, 1,394.82 and 280.80

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Solution

The fourth proportional to 930.24, 1,394.82 and 280.80 is: 421.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.24 : 1,394.82 = 280.80 : x
  2. Step 2: Convert to fraction form
    930.24/1,394.82 = 280.80/x
  3. Step 3: Cross multiply
    930.24x = 1,394.82 × 280.80
  4. Step 4: Simplify right side
    930.24x = 391,665.46
  5. Step 5: Solve for x
    x = 391,665.46/930.24
  6. Step 6: Final answer
    x = 421.04

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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.