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Finding the Fourth Proportional to 2,859.72, 4,289.17 and 1,398.48

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Solution

The fourth proportional to 2,859.72, 4,289.17 and 1,398.48 is: 2,097.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,859.72 : 4,289.17 = 1,398.48 : x
  2. Step 2: Convert to fraction form
    2,859.72/4,289.17 = 1,398.48/x
  3. Step 3: Cross multiply
    2,859.72x = 4,289.17 × 1,398.48
  4. Step 4: Simplify right side
    2,859.72x = 5,998,318.46
  5. Step 5: Solve for x
    x = 5,998,318.46/2,859.72
  6. Step 6: Final answer
    x = 2,097.52

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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.