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Finding the Fourth Proportional to 2,130.92, 3,196.66 and 744.36

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Solution

The fourth proportional to 2,130.92, 3,196.66 and 744.36 is: 1,116.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.92 : 3,196.66 = 744.36 : x
  2. Step 2: Convert to fraction form
    2,130.92/3,196.66 = 744.36/x
  3. Step 3: Cross multiply
    2,130.92x = 3,196.66 × 744.36
  4. Step 4: Simplify right side
    2,130.92x = 2,379,465.84
  5. Step 5: Solve for x
    x = 2,379,465.84/2,130.92
  6. Step 6: Final answer
    x = 1,116.64

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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.