Home / 2,312.12-3,190.76-1,264.20

Finding the Fourth Proportional to 2,312.12, 3,190.76 and 1,264.20

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Solution

The fourth proportional to 2,312.12, 3,190.76 and 1,264.20 is: 1,744.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,312.12 : 3,190.76 = 1,264.20 : x
  2. Step 2: Convert to fraction form
    2,312.12/3,190.76 = 1,264.20/x
  3. Step 3: Cross multiply
    2,312.12x = 3,190.76 × 1,264.20
  4. Step 4: Simplify right side
    2,312.12x = 4,033,758.79
  5. Step 5: Solve for x
    x = 4,033,758.79/2,312.12
  6. Step 6: Final answer
    x = 1,744.61

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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.