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Finding the Fourth Proportional to 2,011.12, 3,016.56 and 712.56

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Solution

The fourth proportional to 2,011.12, 3,016.56 and 712.56 is: 1,068.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,011.12 : 3,016.56 = 712.56 : x
  2. Step 2: Convert to fraction form
    2,011.12/3,016.56 = 712.56/x
  3. Step 3: Cross multiply
    2,011.12x = 3,016.56 × 712.56
  4. Step 4: Simplify right side
    2,011.12x = 2,149,479.99
  5. Step 5: Solve for x
    x = 2,149,479.99/2,011.12
  6. Step 6: Final answer
    x = 1,068.80

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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.