Home / 1,989.52-2,746.78-1,281.71

Finding the Fourth Proportional to 1,989.52, 2,746.78 and 1,281.71

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Solution

The fourth proportional to 1,989.52, 2,746.78 and 1,281.71 is: 1,769.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.52 : 2,746.78 = 1,281.71 : x
  2. Step 2: Convert to fraction form
    1,989.52/2,746.78 = 1,281.71/x
  3. Step 3: Cross multiply
    1,989.52x = 2,746.78 × 1,281.71
  4. Step 4: Simplify right side
    1,989.52x = 3,520,579.06
  5. Step 5: Solve for x
    x = 3,520,579.06/1,989.52
  6. Step 6: Final answer
    x = 1,769.56

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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.