Home / 1,725.10-2,579.70-1,281.20

Finding the Fourth Proportional to 1,725.10, 2,579.70 and 1,281.20

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Solution

The fourth proportional to 1,725.10, 2,579.70 and 1,281.20 is: 1,915.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,725.10 : 2,579.70 = 1,281.20 : x
  2. Step 2: Convert to fraction form
    1,725.10/2,579.70 = 1,281.20/x
  3. Step 3: Cross multiply
    1,725.10x = 2,579.70 × 1,281.20
  4. Step 4: Simplify right side
    1,725.10x = 3,305,127.73
  5. Step 5: Solve for x
    x = 3,305,127.73/1,725.10
  6. Step 6: Final answer
    x = 1,915.90

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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.