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Finding the Fourth Proportional to 698.25, 1,046.52 and 491.70

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Solution

The fourth proportional to 698.25, 1,046.52 and 491.70 is: 736.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.25 : 1,046.52 = 491.70 : x
  2. Step 2: Convert to fraction form
    698.25/1,046.52 = 491.70/x
  3. Step 3: Cross multiply
    698.25x = 1,046.52 × 491.70
  4. Step 4: Simplify right side
    698.25x = 514,573.88
  5. Step 5: Solve for x
    x = 514,573.88/698.25
  6. Step 6: Final answer
    x = 736.95

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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.