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Finding the Fourth Proportional to 554.40, 831.56 and 265.76

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Solution

The fourth proportional to 554.40, 831.56 and 265.76 is: 398.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.40 : 831.56 = 265.76 : x
  2. Step 2: Convert to fraction form
    554.40/831.56 = 265.76/x
  3. Step 3: Cross multiply
    554.40x = 831.56 × 265.76
  4. Step 4: Simplify right side
    554.40x = 220,995.39
  5. Step 5: Solve for x
    x = 220,995.39/554.40
  6. Step 6: Final answer
    x = 398.62

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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.