Home / 2,312.67-3,191.44-1,264.72

Finding the Fourth Proportional to 2,312.67, 3,191.44 and 1,264.72

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Solution

The fourth proportional to 2,312.67, 3,191.44 and 1,264.72 is: 1,745.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,312.67 : 3,191.44 = 1,264.72 : x
  2. Step 2: Convert to fraction form
    2,312.67/3,191.44 = 1,264.72/x
  3. Step 3: Cross multiply
    2,312.67x = 3,191.44 × 1,264.72
  4. Step 4: Simplify right side
    2,312.67x = 4,036,278.00
  5. Step 5: Solve for x
    x = 4,036,278.00/2,312.67
  6. Step 6: Final answer
    x = 1,745.29

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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.