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Finding the Fourth Proportional to 613.59, 845.89 and 438.63

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Solution

The fourth proportional to 613.59, 845.89 and 438.63 is: 604.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.59 : 845.89 = 438.63 : x
  2. Step 2: Convert to fraction form
    613.59/845.89 = 438.63/x
  3. Step 3: Cross multiply
    613.59x = 845.89 × 438.63
  4. Step 4: Simplify right side
    613.59x = 371,031.63
  5. Step 5: Solve for x
    x = 371,031.63/613.59
  6. Step 6: Final answer
    x = 604.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.