Home / 1,207.40-1,667.16-834.80

Finding the Fourth Proportional to 1,207.40, 1,667.16 and 834.80

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Solution

The fourth proportional to 1,207.40, 1,667.16 and 834.80 is: 1,152.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207.40 : 1,667.16 = 834.80 : x
  2. Step 2: Convert to fraction form
    1,207.40/1,667.16 = 834.80/x
  3. Step 3: Cross multiply
    1,207.40x = 1,667.16 × 834.80
  4. Step 4: Simplify right side
    1,207.40x = 1,391,745.17
  5. Step 5: Solve for x
    x = 1,391,745.17/1,207.40
  6. Step 6: Final answer
    x = 1,152.68

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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.