Home / 1,638.20-2,260.23-1,047.71

Finding the Fourth Proportional to 1,638.20, 2,260.23 and 1,047.71

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Solution

The fourth proportional to 1,638.20, 2,260.23 and 1,047.71 is: 1,445.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.20 : 2,260.23 = 1,047.71 : x
  2. Step 2: Convert to fraction form
    1,638.20/2,260.23 = 1,047.71/x
  3. Step 3: Cross multiply
    1,638.20x = 2,260.23 × 1,047.71
  4. Step 4: Simplify right side
    1,638.20x = 2,368,065.57
  5. Step 5: Solve for x
    x = 2,368,065.57/1,638.20
  6. Step 6: Final answer
    x = 1,445.53

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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.