Home / 2,280.86-3,145.49-1,440.11

Finding the Fourth Proportional to 2,280.86, 3,145.49 and 1,440.11

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Solution

The fourth proportional to 2,280.86, 3,145.49 and 1,440.11 is: 1,986.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,280.86 : 3,145.49 = 1,440.11 : x
  2. Step 2: Convert to fraction form
    2,280.86/3,145.49 = 1,440.11/x
  3. Step 3: Cross multiply
    2,280.86x = 3,145.49 × 1,440.11
  4. Step 4: Simplify right side
    2,280.86x = 4,529,844.40
  5. Step 5: Solve for x
    x = 4,529,844.40/2,280.86
  6. Step 6: Final answer
    x = 1,986.02

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Double scale
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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.