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Finding the Fourth Proportional to 554.46, 831.78 and 265.86

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Solution

The fourth proportional to 554.46, 831.78 and 265.86 is: 398.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.46 : 831.78 = 265.86 : x
  2. Step 2: Convert to fraction form
    554.46/831.78 = 265.86/x
  3. Step 3: Cross multiply
    554.46x = 831.78 × 265.86
  4. Step 4: Simplify right side
    554.46x = 221,137.03
  5. Step 5: Solve for x
    x = 221,137.03/554.46
  6. Step 6: Final answer
    x = 398.83

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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.