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Finding the Fourth Proportional to 553.86, 831.45 and 310.56

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Solution

The fourth proportional to 553.86, 831.45 and 310.56 is: 466.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.86 : 831.45 = 310.56 : x
  2. Step 2: Convert to fraction form
    553.86/831.45 = 310.56/x
  3. Step 3: Cross multiply
    553.86x = 831.45 × 310.56
  4. Step 4: Simplify right side
    553.86x = 258,215.11
  5. Step 5: Solve for x
    x = 258,215.11/553.86
  6. Step 6: Final answer
    x = 466.21

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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.