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Finding the Fourth Proportional to 613.60, 919.24 and 339.28

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Solution

The fourth proportional to 613.60, 919.24 and 339.28 is: 508.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.60 : 919.24 = 339.28 : x
  2. Step 2: Convert to fraction form
    613.60/919.24 = 339.28/x
  3. Step 3: Cross multiply
    613.60x = 919.24 × 339.28
  4. Step 4: Simplify right side
    613.60x = 311,879.75
  5. Step 5: Solve for x
    x = 311,879.75/613.60
  6. Step 6: Final answer
    x = 508.28

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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.