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Finding the Fourth Proportional to 320.35, 479.62 and 243.63

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Solution

The fourth proportional to 320.35, 479.62 and 243.63 is: 364.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.35 : 479.62 = 243.63 : x
  2. Step 2: Convert to fraction form
    320.35/479.62 = 243.63/x
  3. Step 3: Cross multiply
    320.35x = 479.62 × 243.63
  4. Step 4: Simplify right side
    320.35x = 116,849.82
  5. Step 5: Solve for x
    x = 116,849.82/320.35
  6. Step 6: Final answer
    x = 364.76

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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.