Home / 1,226.90-1,692.95-729.36

Finding the Fourth Proportional to 1,226.90, 1,692.95 and 729.36

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Solution

The fourth proportional to 1,226.90, 1,692.95 and 729.36 is: 1,006.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,226.90 : 1,692.95 = 729.36 : x
  2. Step 2: Convert to fraction form
    1,226.90/1,692.95 = 729.36/x
  3. Step 3: Cross multiply
    1,226.90x = 1,692.95 × 729.36
  4. Step 4: Simplify right side
    1,226.90x = 1,234,770.01
  5. Step 5: Solve for x
    x = 1,234,770.01/1,226.90
  6. Step 6: Final answer
    x = 1,006.41

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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.