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Finding the Fourth Proportional to 868.58, 1,300.56 and 608.88

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Solution

The fourth proportional to 868.58, 1,300.56 and 608.88 is: 911.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.58 : 1,300.56 = 608.88 : x
  2. Step 2: Convert to fraction form
    868.58/1,300.56 = 608.88/x
  3. Step 3: Cross multiply
    868.58x = 1,300.56 × 608.88
  4. Step 4: Simplify right side
    868.58x = 791,884.97
  5. Step 5: Solve for x
    x = 791,884.97/868.58
  6. Step 6: Final answer
    x = 911.70

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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.