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Finding the Fourth Proportional to 1,005.22, 1,506.36 and 731.92

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Solution

The fourth proportional to 1,005.22, 1,506.36 and 731.92 is: 1,096.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,005.22 : 1,506.36 = 731.92 : x
  2. Step 2: Convert to fraction form
    1,005.22/1,506.36 = 731.92/x
  3. Step 3: Cross multiply
    1,005.22x = 1,506.36 × 731.92
  4. Step 4: Simplify right side
    1,005.22x = 1,102,535.01
  5. Step 5: Solve for x
    x = 1,102,535.01/1,005.22
  6. Step 6: Final answer
    x = 1,096.81

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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.