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Finding the Fourth Proportional to 558.54, 838.08 and 478.62

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Solution

The fourth proportional to 558.54, 838.08 and 478.62 is: 718.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.54 : 838.08 = 478.62 : x
  2. Step 2: Convert to fraction form
    558.54/838.08 = 478.62/x
  3. Step 3: Cross multiply
    558.54x = 838.08 × 478.62
  4. Step 4: Simplify right side
    558.54x = 401,121.85
  5. Step 5: Solve for x
    x = 401,121.85/558.54
  6. Step 6: Final answer
    x = 718.16

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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.