Home / 2,831.90-4,242.32-1,855.04

Finding the Fourth Proportional to 2,831.90, 4,242.32 and 1,855.04

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Solution

The fourth proportional to 2,831.90, 4,242.32 and 1,855.04 is: 2,778.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,831.90 : 4,242.32 = 1,855.04 : x
  2. Step 2: Convert to fraction form
    2,831.90/4,242.32 = 1,855.04/x
  3. Step 3: Cross multiply
    2,831.90x = 4,242.32 × 1,855.04
  4. Step 4: Simplify right side
    2,831.90x = 7,869,673.29
  5. Step 5: Solve for x
    x = 7,869,673.29/2,831.90
  6. Step 6: Final answer
    x = 2,778.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.