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Finding the Fourth Proportional to 1,226.72, 1,692.67 and 702.75

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Solution

The fourth proportional to 1,226.72, 1,692.67 and 702.75 is: 969.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,226.72 : 1,692.67 = 702.75 : x
  2. Step 2: Convert to fraction form
    1,226.72/1,692.67 = 702.75/x
  3. Step 3: Cross multiply
    1,226.72x = 1,692.67 × 702.75
  4. Step 4: Simplify right side
    1,226.72x = 1,189,523.84
  5. Step 5: Solve for x
    x = 1,189,523.84/1,226.72
  6. Step 6: Final answer
    x = 969.68

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Half scale
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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.