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Finding the Fourth Proportional to 553.96, 831.12 and 265.42

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Solution

The fourth proportional to 553.96, 831.12 and 265.42 is: 398.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.96 : 831.12 = 265.42 : x
  2. Step 2: Convert to fraction form
    553.96/831.12 = 265.42/x
  3. Step 3: Cross multiply
    553.96x = 831.12 × 265.42
  4. Step 4: Simplify right side
    553.96x = 220,595.87
  5. Step 5: Solve for x
    x = 220,595.87/553.96
  6. Step 6: Final answer
    x = 398.22

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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.