Home / 1,887.20-2,831.18-654.66

Finding the Fourth Proportional to 1,887.20, 2,831.18 and 654.66

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Solution

The fourth proportional to 1,887.20, 2,831.18 and 654.66 is: 982.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,887.20 : 2,831.18 = 654.66 : x
  2. Step 2: Convert to fraction form
    1,887.20/2,831.18 = 654.66/x
  3. Step 3: Cross multiply
    1,887.20x = 2,831.18 × 654.66
  4. Step 4: Simplify right side
    1,887.20x = 1,853,460.30
  5. Step 5: Solve for x
    x = 1,853,460.30/1,887.20
  6. Step 6: Final answer
    x = 982.12

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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.