Home / 1,579.30-2,179.21-916.03

Finding the Fourth Proportional to 1,579.30, 2,179.21 and 916.03

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Solution

The fourth proportional to 1,579.30, 2,179.21 and 916.03 is: 1,263.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,579.30 : 2,179.21 = 916.03 : x
  2. Step 2: Convert to fraction form
    1,579.30/2,179.21 = 916.03/x
  3. Step 3: Cross multiply
    1,579.30x = 2,179.21 × 916.03
  4. Step 4: Simplify right side
    1,579.30x = 1,996,221.74
  5. Step 5: Solve for x
    x = 1,996,221.74/1,579.30
  6. Step 6: Final answer
    x = 1,263.99

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1.5x scale

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.