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Finding the Fourth Proportional to 559.89, 838.54 and 490.69

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Solution

The fourth proportional to 559.89, 838.54 and 490.69 is: 734.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.89 : 838.54 = 490.69 : x
  2. Step 2: Convert to fraction form
    559.89/838.54 = 490.69/x
  3. Step 3: Cross multiply
    559.89x = 838.54 × 490.69
  4. Step 4: Simplify right side
    559.89x = 411,462.09
  5. Step 5: Solve for x
    x = 411,462.09/559.89
  6. Step 6: Final answer
    x = 734.90

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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.