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Finding the Fourth Proportional to 2,802.88, 4,207.07 and 2,138.58

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Solution

The fourth proportional to 2,802.88, 4,207.07 and 2,138.58 is: 3,209.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,802.88 : 4,207.07 = 2,138.58 : x
  2. Step 2: Convert to fraction form
    2,802.88/4,207.07 = 2,138.58/x
  3. Step 3: Cross multiply
    2,802.88x = 4,207.07 × 2,138.58
  4. Step 4: Simplify right side
    2,802.88x = 8,997,161.11
  5. Step 5: Solve for x
    x = 8,997,161.11/2,802.88
  6. Step 6: Final answer
    x = 3,209.97

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1.5x scale

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.