Home / 3,113.78-4,302.47-2,489.45

Finding the Fourth Proportional to 3,113.78, 4,302.47 and 2,489.45

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Solution

The fourth proportional to 3,113.78, 4,302.47 and 2,489.45 is: 3,439.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,113.78 : 4,302.47 = 2,489.45 : x
  2. Step 2: Convert to fraction form
    3,113.78/4,302.47 = 2,489.45/x
  3. Step 3: Cross multiply
    3,113.78x = 4,302.47 × 2,489.45
  4. Step 4: Simplify right side
    3,113.78x = 10,710,768.65
  5. Step 5: Solve for x
    x = 10,710,768.65/3,113.78
  6. Step 6: Final answer
    x = 3,439.80

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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.