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Finding the Fourth Proportional to 339.99, 470.22 and 303.08

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Solution

The fourth proportional to 339.99, 470.22 and 303.08 is: 419.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.99 : 470.22 = 303.08 : x
  2. Step 2: Convert to fraction form
    339.99/470.22 = 303.08/x
  3. Step 3: Cross multiply
    339.99x = 470.22 × 303.08
  4. Step 4: Simplify right side
    339.99x = 142,514.28
  5. Step 5: Solve for x
    x = 142,514.28/339.99
  6. Step 6: Final answer
    x = 419.17

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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.