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Finding the Fourth Proportional to 831.45, 1,246.32 and 523.51

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Solution

The fourth proportional to 831.45, 1,246.32 and 523.51 is: 784.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    831.45 : 1,246.32 = 523.51 : x
  2. Step 2: Convert to fraction form
    831.45/1,246.32 = 523.51/x
  3. Step 3: Cross multiply
    831.45x = 1,246.32 × 523.51
  4. Step 4: Simplify right side
    831.45x = 652,460.98
  5. Step 5: Solve for x
    x = 652,460.98/831.45
  6. Step 6: Final answer
    x = 784.73

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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.