Home / 1,267.12-1,885.70-1,221.04

Finding the Fourth Proportional to 1,267.12, 1,885.70 and 1,221.04

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Solution

The fourth proportional to 1,267.12, 1,885.70 and 1,221.04 is: 1,817.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,267.12 : 1,885.70 = 1,221.04 : x
  2. Step 2: Convert to fraction form
    1,267.12/1,885.70 = 1,221.04/x
  3. Step 3: Cross multiply
    1,267.12x = 1,885.70 × 1,221.04
  4. Step 4: Simplify right side
    1,267.12x = 2,302,515.13
  5. Step 5: Solve for x
    x = 2,302,515.13/1,267.12
  6. Step 6: Final answer
    x = 1,817.12

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.