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Finding the Fourth Proportional to 318.93, 439.90 and 224.25

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Solution

The fourth proportional to 318.93, 439.90 and 224.25 is: 309.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.93 : 439.90 = 224.25 : x
  2. Step 2: Convert to fraction form
    318.93/439.90 = 224.25/x
  3. Step 3: Cross multiply
    318.93x = 439.90 × 224.25
  4. Step 4: Simplify right side
    318.93x = 98,647.01
  5. Step 5: Solve for x
    x = 98,647.01/318.93
  6. Step 6: Final answer
    x = 309.31

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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.