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Finding the Fourth Proportional to 2,011.92, 3,016.80 and 713.22

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Solution

The fourth proportional to 2,011.92, 3,016.80 and 713.22 is: 1,069.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,011.92 : 3,016.80 = 713.22 : x
  2. Step 2: Convert to fraction form
    2,011.92/3,016.80 = 713.22/x
  3. Step 3: Cross multiply
    2,011.92x = 3,016.80 × 713.22
  4. Step 4: Simplify right side
    2,011.92x = 2,151,638.53
  5. Step 5: Solve for x
    x = 2,151,638.53/2,011.92
  6. Step 6: Final answer
    x = 1,069.45

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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.