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Finding the Fourth Proportional to 339.99, 469.21 and 190.62

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Solution

The fourth proportional to 339.99, 469.21 and 190.62 is: 263.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.99 : 469.21 = 190.62 : x
  2. Step 2: Convert to fraction form
    339.99/469.21 = 190.62/x
  3. Step 3: Cross multiply
    339.99x = 469.21 × 190.62
  4. Step 4: Simplify right side
    339.99x = 89,440.81
  5. Step 5: Solve for x
    x = 89,440.81/339.99
  6. Step 6: Final answer
    x = 263.07

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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.