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Finding the Fourth Proportional to 559.63, 838.99 and 438.43

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Solution

The fourth proportional to 559.63, 838.99 and 438.43 is: 657.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.63 : 838.99 = 438.43 : x
  2. Step 2: Convert to fraction form
    559.63/838.99 = 438.43/x
  3. Step 3: Cross multiply
    559.63x = 838.99 × 438.43
  4. Step 4: Simplify right side
    559.63x = 367,838.39
  5. Step 5: Solve for x
    x = 367,838.39/559.63
  6. Step 6: Final answer
    x = 657.29

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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.