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Finding the Fourth Proportional to 4,480.87, 6,721.32 and 1,360.90

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Solution

The fourth proportional to 4,480.87, 6,721.32 and 1,360.90 is: 2,041.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,480.87 : 6,721.32 = 1,360.90 : x
  2. Step 2: Convert to fraction form
    4,480.87/6,721.32 = 1,360.90/x
  3. Step 3: Cross multiply
    4,480.87x = 6,721.32 × 1,360.90
  4. Step 4: Simplify right side
    4,480.87x = 9,147,044.39
  5. Step 5: Solve for x
    x = 9,147,044.39/4,480.87
  6. Step 6: Final answer
    x = 2,041.35

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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.