Home / 2,851.12-4,276.32-1,389.92

Finding the Fourth Proportional to 2,851.12, 4,276.32 and 1,389.92

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Solution

The fourth proportional to 2,851.12, 4,276.32 and 1,389.92 is: 2,084.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,851.12 : 4,276.32 = 1,389.92 : x
  2. Step 2: Convert to fraction form
    2,851.12/4,276.32 = 1,389.92/x
  3. Step 3: Cross multiply
    2,851.12x = 4,276.32 × 1,389.92
  4. Step 4: Simplify right side
    2,851.12x = 5,943,742.69
  5. Step 5: Solve for x
    x = 5,943,742.69/2,851.12
  6. Step 6: Final answer
    x = 2,084.70

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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.