Home / 2,115.43-2,920.73-1,319.08

Finding the Fourth Proportional to 2,115.43, 2,920.73 and 1,319.08

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Solution

The fourth proportional to 2,115.43, 2,920.73 and 1,319.08 is: 1,821.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.43 : 2,920.73 = 1,319.08 : x
  2. Step 2: Convert to fraction form
    2,115.43/2,920.73 = 1,319.08/x
  3. Step 3: Cross multiply
    2,115.43x = 2,920.73 × 1,319.08
  4. Step 4: Simplify right side
    2,115.43x = 3,852,676.53
  5. Step 5: Solve for x
    x = 3,852,676.53/2,115.43
  6. Step 6: Final answer
    x = 1,821.23

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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.