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Finding the Fourth Proportional to 868.59, 1,199.23 and 669.05

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Solution

The fourth proportional to 868.59, 1,199.23 and 669.05 is: 923.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.59 : 1,199.23 = 669.05 : x
  2. Step 2: Convert to fraction form
    868.59/1,199.23 = 669.05/x
  3. Step 3: Cross multiply
    868.59x = 1,199.23 × 669.05
  4. Step 4: Simplify right side
    868.59x = 802,337.16
  5. Step 5: Solve for x
    x = 802,337.16/868.59
  6. Step 6: Final answer
    x = 923.72

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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.