Home / 1,378.75-2,066.30-1,011.82

Finding the Fourth Proportional to 1,378.75, 2,066.30 and 1,011.82

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Solution

The fourth proportional to 1,378.75, 2,066.30 and 1,011.82 is: 1,516.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,378.75 : 2,066.30 = 1,011.82 : x
  2. Step 2: Convert to fraction form
    1,378.75/2,066.30 = 1,011.82/x
  3. Step 3: Cross multiply
    1,378.75x = 2,066.30 × 1,011.82
  4. Step 4: Simplify right side
    1,378.75x = 2,090,713.44
  5. Step 5: Solve for x
    x = 2,090,713.44/1,378.75
  6. Step 6: Final answer
    x = 1,516.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.