Home / 1,579.12-2,179.20-916.08

Finding the Fourth Proportional to 1,579.12, 2,179.20 and 916.08

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Solution

The fourth proportional to 1,579.12, 2,179.20 and 916.08 is: 1,264.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,579.12 : 2,179.20 = 916.08 : x
  2. Step 2: Convert to fraction form
    1,579.12/2,179.20 = 916.08/x
  3. Step 3: Cross multiply
    1,579.12x = 2,179.20 × 916.08
  4. Step 4: Simplify right side
    1,579.12x = 1,996,321.54
  5. Step 5: Solve for x
    x = 1,996,321.54/1,579.12
  6. Step 6: Final answer
    x = 1,264.20

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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.