Home / 1,620.76-2,431.16-1,298.18

Finding the Fourth Proportional to 1,620.76, 2,431.16 and 1,298.18

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Solution

The fourth proportional to 1,620.76, 2,431.16 and 1,298.18 is: 1,947.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,620.76 : 2,431.16 = 1,298.18 : x
  2. Step 2: Convert to fraction form
    1,620.76/2,431.16 = 1,298.18/x
  3. Step 3: Cross multiply
    1,620.76x = 2,431.16 × 1,298.18
  4. Step 4: Simplify right side
    1,620.76x = 3,156,083.29
  5. Step 5: Solve for x
    x = 3,156,083.29/1,620.76
  6. Step 6: Final answer
    x = 1,947.29

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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.