Home / 2,509.80-3,463.42-1,390.79

Finding the Fourth Proportional to 2,509.80, 3,463.42 and 1,390.79

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Solution

The fourth proportional to 2,509.80, 3,463.42 and 1,390.79 is: 1,919.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,509.80 : 3,463.42 = 1,390.79 : x
  2. Step 2: Convert to fraction form
    2,509.80/3,463.42 = 1,390.79/x
  3. Step 3: Cross multiply
    2,509.80x = 3,463.42 × 1,390.79
  4. Step 4: Simplify right side
    2,509.80x = 4,816,874.32
  5. Step 5: Solve for x
    x = 4,816,874.32/2,509.80
  6. Step 6: Final answer
    x = 1,919.23

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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.