Home / 2,178.09-3,005.51-1,339.00

Finding the Fourth Proportional to 2,178.09, 3,005.51 and 1,339.00

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Solution

The fourth proportional to 2,178.09, 3,005.51 and 1,339.00 is: 1,847.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.09 : 3,005.51 = 1,339.00 : x
  2. Step 2: Convert to fraction form
    2,178.09/3,005.51 = 1,339.00/x
  3. Step 3: Cross multiply
    2,178.09x = 3,005.51 × 1,339.00
  4. Step 4: Simplify right side
    2,178.09x = 4,024,363.68
  5. Step 5: Solve for x
    x = 4,024,363.68/2,178.09
  6. Step 6: Final answer
    x = 1,847.66

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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.