Home / 3,138.69-4,331.66-1,722.65

Finding the Fourth Proportional to 3,138.69, 4,331.66 and 1,722.65

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Solution

The fourth proportional to 3,138.69, 4,331.66 and 1,722.65 is: 2,377.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.69 : 4,331.66 = 1,722.65 : x
  2. Step 2: Convert to fraction form
    3,138.69/4,331.66 = 1,722.65/x
  3. Step 3: Cross multiply
    3,138.69x = 4,331.66 × 1,722.65
  4. Step 4: Simplify right side
    3,138.69x = 7,461,934.10
  5. Step 5: Solve for x
    x = 7,461,934.10/3,138.69
  6. Step 6: Final answer
    x = 2,377.40

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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.