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Finding the Fourth Proportional to 818.39, 1,228.33 and 636.95

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Solution

The fourth proportional to 818.39, 1,228.33 and 636.95 is: 956.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.39 : 1,228.33 = 636.95 : x
  2. Step 2: Convert to fraction form
    818.39/1,228.33 = 636.95/x
  3. Step 3: Cross multiply
    818.39x = 1,228.33 × 636.95
  4. Step 4: Simplify right side
    818.39x = 782,377.06
  5. Step 5: Solve for x
    x = 782,377.06/818.39
  6. Step 6: Final answer
    x = 956.00

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1.5x scale

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.