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Finding the Fourth Proportional to 696, 1,043.15 and 489.45

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Solution

The fourth proportional to 696, 1,043.15 and 489.45 is: 733.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    696 : 1,043.15 = 489.45 : x
  2. Step 2: Convert to fraction form
    696/1,043.15 = 489.45/x
  3. Step 3: Cross multiply
    696x = 1,043.15 × 489.45
  4. Step 4: Simplify right side
    696x = 510,567.32
  5. Step 5: Solve for x
    x = 510,567.32/696
  6. Step 6: Final answer
    x = 733.57

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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.