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Finding the Fourth Proportional to 1,327.72, 1,831.26 and 803.08

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Solution

The fourth proportional to 1,327.72, 1,831.26 and 803.08 is: 1,107.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,327.72 : 1,831.26 = 803.08 : x
  2. Step 2: Convert to fraction form
    1,327.72/1,831.26 = 803.08/x
  3. Step 3: Cross multiply
    1,327.72x = 1,831.26 × 803.08
  4. Step 4: Simplify right side
    1,327.72x = 1,470,648.28
  5. Step 5: Solve for x
    x = 1,470,648.28/1,327.72
  6. Step 6: Final answer
    x = 1,107.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.