Home / 2,138.09-2,950.78-1,298.88

Finding the Fourth Proportional to 2,138.09, 2,950.78 and 1,298.88

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Solution

The fourth proportional to 2,138.09, 2,950.78 and 1,298.88 is: 1,792.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,138.09 : 2,950.78 = 1,298.88 : x
  2. Step 2: Convert to fraction form
    2,138.09/2,950.78 = 1,298.88/x
  3. Step 3: Cross multiply
    2,138.09x = 2,950.78 × 1,298.88
  4. Step 4: Simplify right side
    2,138.09x = 3,832,700.02
  5. Step 5: Solve for x
    x = 3,832,700.02/2,138.09
  6. Step 6: Final answer
    x = 1,792.58

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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.