Home / 2,230.39-3,077.80-1,309.78

Finding the Fourth Proportional to 2,230.39, 3,077.80 and 1,309.78

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Solution

The fourth proportional to 2,230.39, 3,077.80 and 1,309.78 is: 1,807.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,230.39 : 3,077.80 = 1,309.78 : x
  2. Step 2: Convert to fraction form
    2,230.39/3,077.80 = 1,309.78/x
  3. Step 3: Cross multiply
    2,230.39x = 3,077.80 × 1,309.78
  4. Step 4: Simplify right side
    2,230.39x = 4,031,240.88
  5. Step 5: Solve for x
    x = 4,031,240.88/2,230.39
  6. Step 6: Final answer
    x = 1,807.42

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1.5x scale

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.