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Finding the Fourth Proportional to 674.87, 919.55 and 659.88

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Solution

The fourth proportional to 674.87, 919.55 and 659.88 is: 899.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.87 : 919.55 = 659.88 : x
  2. Step 2: Convert to fraction form
    674.87/919.55 = 659.88/x
  3. Step 3: Cross multiply
    674.87x = 919.55 × 659.88
  4. Step 4: Simplify right side
    674.87x = 606,794.30
  5. Step 5: Solve for x
    x = 606,794.30/674.87
  6. Step 6: Final answer
    x = 899.13

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.