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Finding the Fourth Proportional to 868.84, 1,199.38 and 607.88

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Solution

The fourth proportional to 868.84, 1,199.38 and 607.88 is: 839.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.84 : 1,199.38 = 607.88 : x
  2. Step 2: Convert to fraction form
    868.84/1,199.38 = 607.88/x
  3. Step 3: Cross multiply
    868.84x = 1,199.38 × 607.88
  4. Step 4: Simplify right side
    868.84x = 729,079.11
  5. Step 5: Solve for x
    x = 729,079.11/868.84
  6. Step 6: Final answer
    x = 839.14

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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.