Home / 2,280.40-3,146.92-1,285.68

Finding the Fourth Proportional to 2,280.40, 3,146.92 and 1,285.68

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Solution

The fourth proportional to 2,280.40, 3,146.92 and 1,285.68 is: 1,774.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,280.40 : 3,146.92 = 1,285.68 : x
  2. Step 2: Convert to fraction form
    2,280.40/3,146.92 = 1,285.68/x
  3. Step 3: Cross multiply
    2,280.40x = 3,146.92 × 1,285.68
  4. Step 4: Simplify right side
    2,280.40x = 4,045,932.11
  5. Step 5: Solve for x
    x = 4,045,932.11/2,280.40
  6. Step 6: Final answer
    x = 1,774.22

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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.