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Finding the Fourth Proportional to 320.33, 479.28 and 190.40

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Solution

The fourth proportional to 320.33, 479.28 and 190.40 is: 284.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.33 : 479.28 = 190.40 : x
  2. Step 2: Convert to fraction form
    320.33/479.28 = 190.40/x
  3. Step 3: Cross multiply
    320.33x = 479.28 × 190.40
  4. Step 4: Simplify right side
    320.33x = 91,252.52
  5. Step 5: Solve for x
    x = 91,252.52/320.33
  6. Step 6: Final answer
    x = 284.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.