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Finding the Fourth Proportional to 698.76, 963.66 and 436.80

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Solution

The fourth proportional to 698.76, 963.66 and 436.80 is: 602.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.76 : 963.66 = 436.80 : x
  2. Step 2: Convert to fraction form
    698.76/963.66 = 436.80/x
  3. Step 3: Cross multiply
    698.76x = 963.66 × 436.80
  4. Step 4: Simplify right side
    698.76x = 420,926.69
  5. Step 5: Solve for x
    x = 420,926.69/698.76
  6. Step 6: Final answer
    x = 602.39

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Double scale
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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.