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Finding the Fourth Proportional to 604.78, 834.72 and 356.16

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Solution

The fourth proportional to 604.78, 834.72 and 356.16 is: 491.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    604.78 : 834.72 = 356.16 : x
  2. Step 2: Convert to fraction form
    604.78/834.72 = 356.16/x
  3. Step 3: Cross multiply
    604.78x = 834.72 × 356.16
  4. Step 4: Simplify right side
    604.78x = 297,293.88
  5. Step 5: Solve for x
    x = 297,293.88/604.78
  6. Step 6: Final answer
    x = 491.57

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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.