Home / 2,312.82-3,191.70-1,264.89

Finding the Fourth Proportional to 2,312.82, 3,191.70 and 1,264.89

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Solution

The fourth proportional to 2,312.82, 3,191.70 and 1,264.89 is: 1,745.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,312.82 : 3,191.70 = 1,264.89 : x
  2. Step 2: Convert to fraction form
    2,312.82/3,191.70 = 1,264.89/x
  3. Step 3: Cross multiply
    2,312.82x = 3,191.70 × 1,264.89
  4. Step 4: Simplify right side
    2,312.82x = 4,037,149.41
  5. Step 5: Solve for x
    x = 4,037,149.41/2,312.82
  6. Step 6: Final answer
    x = 1,745.55

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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.