Home / 2,831.89-4,228.75-2,312.91

Finding the Fourth Proportional to 2,831.89, 4,228.75 and 2,312.91

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Solution

The fourth proportional to 2,831.89, 4,228.75 and 2,312.91 is: 3,453.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,831.89 : 4,228.75 = 2,312.91 : x
  2. Step 2: Convert to fraction form
    2,831.89/4,228.75 = 2,312.91/x
  3. Step 3: Cross multiply
    2,831.89x = 4,228.75 × 2,312.91
  4. Step 4: Simplify right side
    2,831.89x = 9,780,718.16
  5. Step 5: Solve for x
    x = 9,780,718.16/2,831.89
  6. Step 6: Final answer
    x = 3,453.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.