Home / 1,869.47-2,579.99-1,238.90

Finding the Fourth Proportional to 1,869.47, 2,579.99 and 1,238.90

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Solution

The fourth proportional to 1,869.47, 2,579.99 and 1,238.90 is: 1,709.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,869.47 : 2,579.99 = 1,238.90 : x
  2. Step 2: Convert to fraction form
    1,869.47/2,579.99 = 1,238.90/x
  3. Step 3: Cross multiply
    1,869.47x = 2,579.99 × 1,238.90
  4. Step 4: Simplify right side
    1,869.47x = 3,196,330.52
  5. Step 5: Solve for x
    x = 3,196,330.52/1,869.47
  6. Step 6: Final answer
    x = 1,709.76

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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.