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Finding the Fourth Proportional to 698.10, 963.72 and 436.20

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Solution

The fourth proportional to 698.10, 963.72 and 436.20 is: 602.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.10 : 963.72 = 436.20 : x
  2. Step 2: Convert to fraction form
    698.10/963.72 = 436.20/x
  3. Step 3: Cross multiply
    698.10x = 963.72 × 436.20
  4. Step 4: Simplify right side
    698.10x = 420,374.66
  5. Step 5: Solve for x
    x = 420,374.66/698.10
  6. Step 6: Final answer
    x = 602.17

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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.