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Finding the Fourth Proportional to 696.30, 1,043.18 and 489.95

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Solution

The fourth proportional to 696.30, 1,043.18 and 489.95 is: 734.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.30 : 1,043.18 = 489.95 : x
  2. Step 2: Convert to fraction form
    696.30/1,043.18 = 489.95/x
  3. Step 3: Cross multiply
    696.30x = 1,043.18 × 489.95
  4. Step 4: Simplify right side
    696.30x = 511,104.12
  5. Step 5: Solve for x
    x = 511,104.12/696.30
  6. Step 6: Final answer
    x = 734.03

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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.