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Finding the Fourth Proportional to 3,887.64, 5,831.38 and 965.91

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Solution

The fourth proportional to 3,887.64, 5,831.38 and 965.91 is: 1,448.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,887.64 : 5,831.38 = 965.91 : x
  2. Step 2: Convert to fraction form
    3,887.64/5,831.38 = 965.91/x
  3. Step 3: Cross multiply
    3,887.64x = 5,831.38 × 965.91
  4. Step 4: Simplify right side
    3,887.64x = 5,632,588.26
  5. Step 5: Solve for x
    x = 5,632,588.26/3,887.64
  6. Step 6: Final answer
    x = 1,448.85

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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.