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Finding the Fourth Proportional to 558.81, 838.26 and 168.78

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Solution

The fourth proportional to 558.81, 838.26 and 168.78 is: 253.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.81 : 838.26 = 168.78 : x
  2. Step 2: Convert to fraction form
    558.81/838.26 = 168.78/x
  3. Step 3: Cross multiply
    558.81x = 838.26 × 168.78
  4. Step 4: Simplify right side
    558.81x = 141,476.49
  5. Step 5: Solve for x
    x = 141,476.49/558.81
  6. Step 6: Final answer
    x = 253.17

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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.