Home / 2,280.58-3,147.28-1,285.90

Finding the Fourth Proportional to 2,280.58, 3,147.28 and 1,285.90

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Solution

The fourth proportional to 2,280.58, 3,147.28 and 1,285.90 is: 1,774.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,280.58 : 3,147.28 = 1,285.90 : x
  2. Step 2: Convert to fraction form
    2,280.58/3,147.28 = 1,285.90/x
  3. Step 3: Cross multiply
    2,280.58x = 3,147.28 × 1,285.90
  4. Step 4: Simplify right side
    2,280.58x = 4,047,087.35
  5. Step 5: Solve for x
    x = 4,047,087.35/2,280.58
  6. Step 6: Final answer
    x = 1,774.59

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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.