Home / 2,178.15-3,004.32-1,431.87

Finding the Fourth Proportional to 2,178.15, 3,004.32 and 1,431.87

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Solution

The fourth proportional to 2,178.15, 3,004.32 and 1,431.87 is: 1,974.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.15 : 3,004.32 = 1,431.87 : x
  2. Step 2: Convert to fraction form
    2,178.15/3,004.32 = 1,431.87/x
  3. Step 3: Cross multiply
    2,178.15x = 3,004.32 × 1,431.87
  4. Step 4: Simplify right side
    2,178.15x = 4,301,780.66
  5. Step 5: Solve for x
    x = 4,301,780.66/2,178.15
  6. Step 6: Final answer
    x = 1,974.97

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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.