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Finding the Fourth Proportional to 554.12, 831.26 and 265.55

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Solution

The fourth proportional to 554.12, 831.26 and 265.55 is: 398.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.12 : 831.26 = 265.55 : x
  2. Step 2: Convert to fraction form
    554.12/831.26 = 265.55/x
  3. Step 3: Cross multiply
    554.12x = 831.26 × 265.55
  4. Step 4: Simplify right side
    554.12x = 220,743.84
  5. Step 5: Solve for x
    x = 220,743.84/554.12
  6. Step 6: Final answer
    x = 398.37

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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.