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Finding the Fourth Proportional to 554.52, 831.36 and 280.32

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Solution

The fourth proportional to 554.52, 831.36 and 280.32 is: 420.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.52 : 831.36 = 280.32 : x
  2. Step 2: Convert to fraction form
    554.52/831.36 = 280.32/x
  3. Step 3: Cross multiply
    554.52x = 831.36 × 280.32
  4. Step 4: Simplify right side
    554.52x = 233,046.84
  5. Step 5: Solve for x
    x = 233,046.84/554.52
  6. Step 6: Final answer
    x = 420.27

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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.