Home / 2,776.90-3,831.20-1,782.72

Finding the Fourth Proportional to 2,776.90, 3,831.20 and 1,782.72

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Solution

The fourth proportional to 2,776.90, 3,831.20 and 1,782.72 is: 2,459.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,776.90 : 3,831.20 = 1,782.72 : x
  2. Step 2: Convert to fraction form
    2,776.90/3,831.20 = 1,782.72/x
  3. Step 3: Cross multiply
    2,776.90x = 3,831.20 × 1,782.72
  4. Step 4: Simplify right side
    2,776.90x = 6,829,956.86
  5. Step 5: Solve for x
    x = 6,829,956.86/2,776.90
  6. Step 6: Final answer
    x = 2,459.56

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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.