Home / 1,722.47-2,579.56-1,427.78

Finding the Fourth Proportional to 1,722.47, 2,579.56 and 1,427.78

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Solution

The fourth proportional to 1,722.47, 2,579.56 and 1,427.78 is: 2,138.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,722.47 : 2,579.56 = 1,427.78 : x
  2. Step 2: Convert to fraction form
    1,722.47/2,579.56 = 1,427.78/x
  3. Step 3: Cross multiply
    1,722.47x = 2,579.56 × 1,427.78
  4. Step 4: Simplify right side
    1,722.47x = 3,683,047.06
  5. Step 5: Solve for x
    x = 3,683,047.06/1,722.47
  6. Step 6: Final answer
    x = 2,138.24

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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.