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Finding the Fourth Proportional to 1,894.49, 2,842.57 and 724.85

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Solution

The fourth proportional to 1,894.49, 2,842.57 and 724.85 is: 1,087.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,894.49 : 2,842.57 = 724.85 : x
  2. Step 2: Convert to fraction form
    1,894.49/2,842.57 = 724.85/x
  3. Step 3: Cross multiply
    1,894.49x = 2,842.57 × 724.85
  4. Step 4: Simplify right side
    1,894.49x = 2,060,432.18
  5. Step 5: Solve for x
    x = 2,060,432.18/1,894.49
  6. Step 6: Final answer
    x = 1,087.59

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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.