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Finding the Fourth Proportional to 1,226.75, 1,692.92 and 674.75

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Solution

The fourth proportional to 1,226.75, 1,692.92 and 674.75 is: 931.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,226.75 : 1,692.92 = 674.75 : x
  2. Step 2: Convert to fraction form
    1,226.75/1,692.92 = 674.75/x
  3. Step 3: Cross multiply
    1,226.75x = 1,692.92 × 674.75
  4. Step 4: Simplify right side
    1,226.75x = 1,142,294.40
  5. Step 5: Solve for x
    x = 1,142,294.40/1,226.75
  6. Step 6: Final answer
    x = 931.16

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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.