Home / 2,230.15-3,077.99-1,285.78

Finding the Fourth Proportional to 2,230.15, 3,077.99 and 1,285.78

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Solution

The fourth proportional to 2,230.15, 3,077.99 and 1,285.78 is: 1,774.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,230.15 : 3,077.99 = 1,285.78 : x
  2. Step 2: Convert to fraction form
    2,230.15/3,077.99 = 1,285.78/x
  3. Step 3: Cross multiply
    2,230.15x = 3,077.99 × 1,285.78
  4. Step 4: Simplify right side
    2,230.15x = 3,957,617.98
  5. Step 5: Solve for x
    x = 3,957,617.98/2,230.15
  6. Step 6: Final answer
    x = 1,774.60

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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.