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Finding the Fourth Proportional to 339.24, 470.54 and 330.24

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Solution

The fourth proportional to 339.24, 470.54 and 330.24 is: 458.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.24 : 470.54 = 330.24 : x
  2. Step 2: Convert to fraction form
    339.24/470.54 = 330.24/x
  3. Step 3: Cross multiply
    339.24x = 470.54 × 330.24
  4. Step 4: Simplify right side
    339.24x = 155,390.19
  5. Step 5: Solve for x
    x = 155,390.19/339.24
  6. Step 6: Final answer
    x = 458.06

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.