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Finding the Fourth Proportional to 553.84, 831.26 and 348.78

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Solution

The fourth proportional to 553.84, 831.26 and 348.78 is: 523.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.84 : 831.26 = 348.78 : x
  2. Step 2: Convert to fraction form
    553.84/831.26 = 348.78/x
  3. Step 3: Cross multiply
    553.84x = 831.26 × 348.78
  4. Step 4: Simplify right side
    553.84x = 289,926.86
  5. Step 5: Solve for x
    x = 289,926.86/553.84
  6. Step 6: Final answer
    x = 523.48

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Double scale
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Similar ratio
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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.