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Finding the Fourth Proportional to 390.10, 584.39 and 236.10

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Solution

The fourth proportional to 390.10, 584.39 and 236.10 is: 353.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    390.10 : 584.39 = 236.10 : x
  2. Step 2: Convert to fraction form
    390.10/584.39 = 236.10/x
  3. Step 3: Cross multiply
    390.10x = 584.39 × 236.10
  4. Step 4: Simplify right side
    390.10x = 137,974.48
  5. Step 5: Solve for x
    x = 137,974.48/390.10
  6. Step 6: Final answer
    x = 353.69

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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.