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Finding the Fourth Proportional to 554.15, 831.29 and 480.44

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Solution

The fourth proportional to 554.15, 831.29 and 480.44 is: 720.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.15 : 831.29 = 480.44 : x
  2. Step 2: Convert to fraction form
    554.15/831.29 = 480.44/x
  3. Step 3: Cross multiply
    554.15x = 831.29 × 480.44
  4. Step 4: Simplify right side
    554.15x = 399,384.97
  5. Step 5: Solve for x
    x = 399,384.97/554.15
  6. Step 6: Final answer
    x = 720.72

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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.