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Finding the Fourth Proportional to 553.38, 831.15 and 450.74

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Solution

The fourth proportional to 553.38, 831.15 and 450.74 is: 676.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.38 : 831.15 = 450.74 : x
  2. Step 2: Convert to fraction form
    553.38/831.15 = 450.74/x
  3. Step 3: Cross multiply
    553.38x = 831.15 × 450.74
  4. Step 4: Simplify right side
    553.38x = 374,632.55
  5. Step 5: Solve for x
    x = 374,632.55/553.38
  6. Step 6: Final answer
    x = 676.99

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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.