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Finding the Fourth Proportional to 3,345.72, 5,019.30 and 1,807.80

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Solution

The fourth proportional to 3,345.72, 5,019.30 and 1,807.80 is: 2,712.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,345.72 : 5,019.30 = 1,807.80 : x
  2. Step 2: Convert to fraction form
    3,345.72/5,019.30 = 1,807.80/x
  3. Step 3: Cross multiply
    3,345.72x = 5,019.30 × 1,807.80
  4. Step 4: Simplify right side
    3,345.72x = 9,073,890.54
  5. Step 5: Solve for x
    x = 9,073,890.54/3,345.72
  6. Step 6: Final answer
    x = 2,712.09

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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.