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Finding the Fourth Proportional to 559.15, 838.60 and 174.40

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Solution

The fourth proportional to 559.15, 838.60 and 174.40 is: 261.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.15 : 838.60 = 174.40 : x
  2. Step 2: Convert to fraction form
    559.15/838.60 = 174.40/x
  3. Step 3: Cross multiply
    559.15x = 838.60 × 174.40
  4. Step 4: Simplify right side
    559.15x = 146,251.84
  5. Step 5: Solve for x
    x = 146,251.84/559.15
  6. Step 6: Final answer
    x = 261.56

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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.