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Finding the Fourth Proportional to 2,803.92, 4,202.69 and 1,705.86

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Solution

The fourth proportional to 2,803.92, 4,202.69 and 1,705.86 is: 2,556.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,803.92 : 4,202.69 = 1,705.86 : x
  2. Step 2: Convert to fraction form
    2,803.92/4,202.69 = 1,705.86/x
  3. Step 3: Cross multiply
    2,803.92x = 4,202.69 × 1,705.86
  4. Step 4: Simplify right side
    2,803.92x = 7,169,192.23
  5. Step 5: Solve for x
    x = 7,169,192.23/2,803.92
  6. Step 6: Final answer
    x = 2,556.85

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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.