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Finding the Fourth Proportional to 1,887.39, 2,831.37 and 717.88

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Solution

The fourth proportional to 1,887.39, 2,831.37 and 717.88 is: 1,076.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,887.39 : 2,831.37 = 717.88 : x
  2. Step 2: Convert to fraction form
    1,887.39/2,831.37 = 717.88/x
  3. Step 3: Cross multiply
    1,887.39x = 2,831.37 × 717.88
  4. Step 4: Simplify right side
    1,887.39x = 2,032,583.90
  5. Step 5: Solve for x
    x = 2,032,583.90/1,887.39
  6. Step 6: Final answer
    x = 1,076.93

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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.