Home / 1,989.56-2,744.01-1,281.46

Finding the Fourth Proportional to 1,989.56, 2,744.01 and 1,281.46

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Solution

The fourth proportional to 1,989.56, 2,744.01 and 1,281.46 is: 1,767.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.56 : 2,744.01 = 1,281.46 : x
  2. Step 2: Convert to fraction form
    1,989.56/2,744.01 = 1,281.46/x
  3. Step 3: Cross multiply
    1,989.56x = 2,744.01 × 1,281.46
  4. Step 4: Simplify right side
    1,989.56x = 3,516,339.05
  5. Step 5: Solve for x
    x = 3,516,339.05/1,989.56
  6. Step 6: Final answer
    x = 1,767.40

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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.