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Finding the Fourth Proportional to 698.15, 963.23 and 449.02

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Solution

The fourth proportional to 698.15, 963.23 and 449.02 is: 619.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.15 : 963.23 = 449.02 : x
  2. Step 2: Convert to fraction form
    698.15/963.23 = 449.02/x
  3. Step 3: Cross multiply
    698.15x = 963.23 × 449.02
  4. Step 4: Simplify right side
    698.15x = 432,508.49
  5. Step 5: Solve for x
    x = 432,508.49/698.15
  6. Step 6: Final answer
    x = 619.50

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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.