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Finding the Fourth Proportional to 698.16, 963.21 and 449.62

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Solution

The fourth proportional to 698.16, 963.21 and 449.62 is: 620.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.16 : 963.21 = 449.62 : x
  2. Step 2: Convert to fraction form
    698.16/963.21 = 449.62/x
  3. Step 3: Cross multiply
    698.16x = 963.21 × 449.62
  4. Step 4: Simplify right side
    698.16x = 433,078.48
  5. Step 5: Solve for x
    x = 433,078.48/698.16
  6. Step 6: Final answer
    x = 620.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.