Home / 1,429.10-2,139.60-1,283.30

Finding the Fourth Proportional to 1,429.10, 2,139.60 and 1,283.30

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Solution

The fourth proportional to 1,429.10, 2,139.60 and 1,283.30 is: 1,921.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,429.10 : 2,139.60 = 1,283.30 : x
  2. Step 2: Convert to fraction form
    1,429.10/2,139.60 = 1,283.30/x
  3. Step 3: Cross multiply
    1,429.10x = 2,139.60 × 1,283.30
  4. Step 4: Simplify right side
    1,429.10x = 2,745,748.68
  5. Step 5: Solve for x
    x = 2,745,748.68/1,429.10
  6. Step 6: Final answer
    x = 1,921.31

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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.