Home / 1,209.24-1,667.97-830.95

Finding the Fourth Proportional to 1,209.24, 1,667.97 and 830.95

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Solution

The fourth proportional to 1,209.24, 1,667.97 and 830.95 is: 1,146.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209.24 : 1,667.97 = 830.95 : x
  2. Step 2: Convert to fraction form
    1,209.24/1,667.97 = 830.95/x
  3. Step 3: Cross multiply
    1,209.24x = 1,667.97 × 830.95
  4. Step 4: Simplify right side
    1,209.24x = 1,385,999.67
  5. Step 5: Solve for x
    x = 1,385,999.67/1,209.24
  6. Step 6: Final answer
    x = 1,146.17

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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.