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Finding the Fourth Proportional to 340.72, 470.09 and 235.68

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Solution

The fourth proportional to 340.72, 470.09 and 235.68 is: 325.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.72 : 470.09 = 235.68 : x
  2. Step 2: Convert to fraction form
    340.72/470.09 = 235.68/x
  3. Step 3: Cross multiply
    340.72x = 470.09 × 235.68
  4. Step 4: Simplify right side
    340.72x = 110,789.63
  5. Step 5: Solve for x
    x = 110,789.63/340.72
  6. Step 6: Final answer
    x = 325.17

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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.