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Finding the Fourth Proportional to 554.84, 831.84 and 280.80

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Solution

The fourth proportional to 554.84, 831.84 and 280.80 is: 420.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.84 : 831.84 = 280.80 : x
  2. Step 2: Convert to fraction form
    554.84/831.84 = 280.80/x
  3. Step 3: Cross multiply
    554.84x = 831.84 × 280.80
  4. Step 4: Simplify right side
    554.84x = 233,580.67
  5. Step 5: Solve for x
    x = 233,580.67/554.84
  6. Step 6: Final answer
    x = 420.99

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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.