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Finding the Fourth Proportional to 2,005.20, 3,007.92 and 706.76

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Solution

The fourth proportional to 2,005.20, 3,007.92 and 706.76 is: 1,060.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,005.20 : 3,007.92 = 706.76 : x
  2. Step 2: Convert to fraction form
    2,005.20/3,007.92 = 706.76/x
  3. Step 3: Cross multiply
    2,005.20x = 3,007.92 × 706.76
  4. Step 4: Simplify right side
    2,005.20x = 2,125,877.54
  5. Step 5: Solve for x
    x = 2,125,877.54/2,005.20
  6. Step 6: Final answer
    x = 1,060.18

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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.