Home / 2,920.38-4,030.05-2,685.28

Finding the Fourth Proportional to 2,920.38, 4,030.05 and 2,685.28

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Solution

The fourth proportional to 2,920.38, 4,030.05 and 2,685.28 is: 3,705.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,920.38 : 4,030.05 = 2,685.28 : x
  2. Step 2: Convert to fraction form
    2,920.38/4,030.05 = 2,685.28/x
  3. Step 3: Cross multiply
    2,920.38x = 4,030.05 × 2,685.28
  4. Step 4: Simplify right side
    2,920.38x = 10,821,805.11
  5. Step 5: Solve for x
    x = 10,821,805.11/2,920.38
  6. Step 6: Final answer
    x = 3,705.61

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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.