Home / 2,274.78-3,140.32-1,390.87

Finding the Fourth Proportional to 2,274.78, 3,140.32 and 1,390.87

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Solution

The fourth proportional to 2,274.78, 3,140.32 and 1,390.87 is: 1,920.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,274.78 : 3,140.32 = 1,390.87 : x
  2. Step 2: Convert to fraction form
    2,274.78/3,140.32 = 1,390.87/x
  3. Step 3: Cross multiply
    2,274.78x = 3,140.32 × 1,390.87
  4. Step 4: Simplify right side
    2,274.78x = 4,367,779.93
  5. Step 5: Solve for x
    x = 4,367,779.93/2,274.78
  6. Step 6: Final answer
    x = 1,920.09

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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.