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Finding the Fourth Proportional to 2,139.36, 3,210.48 and 1,044.48

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Solution

The fourth proportional to 2,139.36, 3,210.48 and 1,044.48 is: 1,567.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,139.36 : 3,210.48 = 1,044.48 : x
  2. Step 2: Convert to fraction form
    2,139.36/3,210.48 = 1,044.48/x
  3. Step 3: Cross multiply
    2,139.36x = 3,210.48 × 1,044.48
  4. Step 4: Simplify right side
    2,139.36x = 3,353,282.15
  5. Step 5: Solve for x
    x = 3,353,282.15/2,139.36
  6. Step 6: Final answer
    x = 1,567.42

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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.