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Finding the Fourth Proportional to 1,226.12, 1,691.98 and 694.94

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Solution

The fourth proportional to 1,226.12, 1,691.98 and 694.94 is: 958.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,226.12 : 1,691.98 = 694.94 : x
  2. Step 2: Convert to fraction form
    1,226.12/1,691.98 = 694.94/x
  3. Step 3: Cross multiply
    1,226.12x = 1,691.98 × 694.94
  4. Step 4: Simplify right side
    1,226.12x = 1,175,824.58
  5. Step 5: Solve for x
    x = 1,175,824.58/1,226.12
  6. Step 6: Final answer
    x = 958.98

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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.