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Finding the Fourth Proportional to 553.88, 831.90 and 451.24

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Solution

The fourth proportional to 553.88, 831.90 and 451.24 is: 677.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.88 : 831.90 = 451.24 : x
  2. Step 2: Convert to fraction form
    553.88/831.90 = 451.24/x
  3. Step 3: Cross multiply
    553.88x = 831.90 × 451.24
  4. Step 4: Simplify right side
    553.88x = 375,386.56
  5. Step 5: Solve for x
    x = 375,386.56/553.88
  6. Step 6: Final answer
    x = 677.74

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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.