Home / 1,579.40-2,179.77-916.11

Finding the Fourth Proportional to 1,579.40, 2,179.77 and 916.11

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Solution

The fourth proportional to 1,579.40, 2,179.77 and 916.11 is: 1,264.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,579.40 : 2,179.77 = 916.11 : x
  2. Step 2: Convert to fraction form
    1,579.40/2,179.77 = 916.11/x
  3. Step 3: Cross multiply
    1,579.40x = 2,179.77 × 916.11
  4. Step 4: Simplify right side
    1,579.40x = 1,996,909.09
  5. Step 5: Solve for x
    x = 1,996,909.09/1,579.40
  6. Step 6: Final answer
    x = 1,264.35

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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.