Home / 2,139.80-2,960.70-1,864.44

Finding the Fourth Proportional to 2,139.80, 2,960.70 and 1,864.44

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Solution

The fourth proportional to 2,139.80, 2,960.70 and 1,864.44 is: 2,579.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,139.80 : 2,960.70 = 1,864.44 : x
  2. Step 2: Convert to fraction form
    2,139.80/2,960.70 = 1,864.44/x
  3. Step 3: Cross multiply
    2,139.80x = 2,960.70 × 1,864.44
  4. Step 4: Simplify right side
    2,139.80x = 5,520,047.51
  5. Step 5: Solve for x
    x = 5,520,047.51/2,139.80
  6. Step 6: Final answer
    x = 2,579.70

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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.