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Finding the Fourth Proportional to 554.31, 831.87 and 280.53

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Solution

The fourth proportional to 554.31, 831.87 and 280.53 is: 421.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.31 : 831.87 = 280.53 : x
  2. Step 2: Convert to fraction form
    554.31/831.87 = 280.53/x
  3. Step 3: Cross multiply
    554.31x = 831.87 × 280.53
  4. Step 4: Simplify right side
    554.31x = 233,364.49
  5. Step 5: Solve for x
    x = 233,364.49/554.31
  6. Step 6: Final answer
    x = 421.00

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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.