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Finding the Fourth Proportional to 968.70, 1,336.78 and 575.80

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Solution

The fourth proportional to 968.70, 1,336.78 and 575.80 is: 794.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.70 : 1,336.78 = 575.80 : x
  2. Step 2: Convert to fraction form
    968.70/1,336.78 = 575.80/x
  3. Step 3: Cross multiply
    968.70x = 1,336.78 × 575.80
  4. Step 4: Simplify right side
    968.70x = 769,717.92
  5. Step 5: Solve for x
    x = 769,717.92/968.70
  6. Step 6: Final answer
    x = 794.59

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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.