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Finding the Fourth Proportional to 831.86, 1,237.97 and 804.18

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Solution

The fourth proportional to 831.86, 1,237.97 and 804.18 is: 1,196.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    831.86 : 1,237.97 = 804.18 : x
  2. Step 2: Convert to fraction form
    831.86/1,237.97 = 804.18/x
  3. Step 3: Cross multiply
    831.86x = 1,237.97 × 804.18
  4. Step 4: Simplify right side
    831.86x = 995,550.71
  5. Step 5: Solve for x
    x = 995,550.71/831.86
  6. Step 6: Final answer
    x = 1,196.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.