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Finding the Fourth Proportional to 3,887.96, 5,831.92 and 1,290.28

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Solution

The fourth proportional to 3,887.96, 5,831.92 and 1,290.28 is: 1,935.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,887.96 : 5,831.92 = 1,290.28 : x
  2. Step 2: Convert to fraction form
    3,887.96/5,831.92 = 1,290.28/x
  3. Step 3: Cross multiply
    3,887.96x = 5,831.92 × 1,290.28
  4. Step 4: Simplify right side
    3,887.96x = 7,524,809.74
  5. Step 5: Solve for x
    x = 7,524,809.74/3,887.96
  6. Step 6: Final answer
    x = 1,935.41

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Similar ratio
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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.