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Finding the Fourth Proportional to 698.60, 1,047.84 and 424.62

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Solution

The fourth proportional to 698.60, 1,047.84 and 424.62 is: 636.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.60 : 1,047.84 = 424.62 : x
  2. Step 2: Convert to fraction form
    698.60/1,047.84 = 424.62/x
  3. Step 3: Cross multiply
    698.60x = 1,047.84 × 424.62
  4. Step 4: Simplify right side
    698.60x = 444,933.82
  5. Step 5: Solve for x
    x = 444,933.82/698.60
  6. Step 6: Final answer
    x = 636.90

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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.