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Finding the Fourth Proportional to 558.66, 838.23 and 216.90

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Solution

The fourth proportional to 558.66, 838.23 and 216.90 is: 325.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.66 : 838.23 = 216.90 : x
  2. Step 2: Convert to fraction form
    558.66/838.23 = 216.90/x
  3. Step 3: Cross multiply
    558.66x = 838.23 × 216.90
  4. Step 4: Simplify right side
    558.66x = 181,812.09
  5. Step 5: Solve for x
    x = 181,812.09/558.66
  6. Step 6: Final answer
    x = 325.44

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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.