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Finding the Fourth Proportional to 831.32, 1,246.59 and 246.11

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Solution

The fourth proportional to 831.32, 1,246.59 and 246.11 is: 369.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    831.32 : 1,246.59 = 246.11 : x
  2. Step 2: Convert to fraction form
    831.32/1,246.59 = 246.11/x
  3. Step 3: Cross multiply
    831.32x = 1,246.59 × 246.11
  4. Step 4: Simplify right side
    831.32x = 306,799.19
  5. Step 5: Solve for x
    x = 306,799.19/831.32
  6. Step 6: Final answer
    x = 369.05

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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.