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Finding the Fourth Proportional to 1,351.01, 2,021.69 and 831.13

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Solution

The fourth proportional to 1,351.01, 2,021.69 and 831.13 is: 1,243.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,351.01 : 2,021.69 = 831.13 : x
  2. Step 2: Convert to fraction form
    1,351.01/2,021.69 = 831.13/x
  3. Step 3: Cross multiply
    1,351.01x = 2,021.69 × 831.13
  4. Step 4: Simplify right side
    1,351.01x = 1,680,284.23
  5. Step 5: Solve for x
    x = 1,680,284.23/1,351.01
  6. Step 6: Final answer
    x = 1,243.72

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.