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Finding the Fourth Proportional to 868.84, 1,199.57 and 669.30

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Solution

The fourth proportional to 868.84, 1,199.57 and 669.30 is: 924.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.84 : 1,199.57 = 669.30 : x
  2. Step 2: Convert to fraction form
    868.84/1,199.57 = 669.30/x
  3. Step 3: Cross multiply
    868.84x = 1,199.57 × 669.30
  4. Step 4: Simplify right side
    868.84x = 802,872.20
  5. Step 5: Solve for x
    x = 802,872.20/868.84
  6. Step 6: Final answer
    x = 924.07

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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.