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Finding the Fourth Proportional to 3,920.38, 5,881.38 and 1,323.28

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Solution

The fourth proportional to 3,920.38, 5,881.38 and 1,323.28 is: 1,985.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,920.38 : 5,881.38 = 1,323.28 : x
  2. Step 2: Convert to fraction form
    3,920.38/5,881.38 = 1,323.28/x
  3. Step 3: Cross multiply
    3,920.38x = 5,881.38 × 1,323.28
  4. Step 4: Simplify right side
    3,920.38x = 7,782,712.53
  5. Step 5: Solve for x
    x = 7,782,712.53/3,920.38
  6. Step 6: Final answer
    x = 1,985.19

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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.