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Finding the Fourth Proportional to 320.31, 479.93 and 190.17

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Solution

The fourth proportional to 320.31, 479.93 and 190.17 is: 284.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.31 : 479.93 = 190.17 : x
  2. Step 2: Convert to fraction form
    320.31/479.93 = 190.17/x
  3. Step 3: Cross multiply
    320.31x = 479.93 × 190.17
  4. Step 4: Simplify right side
    320.31x = 91,267.34
  5. Step 5: Solve for x
    x = 91,267.34/320.31
  6. Step 6: Final answer
    x = 284.93

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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.