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Finding the Fourth Proportional to 613.54, 919.45 and 353.15

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Solution

The fourth proportional to 613.54, 919.45 and 353.15 is: 529.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.54 : 919.45 = 353.15 : x
  2. Step 2: Convert to fraction form
    613.54/919.45 = 353.15/x
  3. Step 3: Cross multiply
    613.54x = 919.45 × 353.15
  4. Step 4: Simplify right side
    613.54x = 324,703.77
  5. Step 5: Solve for x
    x = 324,703.77/613.54
  6. Step 6: Final answer
    x = 529.23

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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.