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Finding the Fourth Proportional to 320.18, 479.73 and 228.72

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Solution

The fourth proportional to 320.18, 479.73 and 228.72 is: 342.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.18 : 479.73 = 228.72 : x
  2. Step 2: Convert to fraction form
    320.18/479.73 = 228.72/x
  3. Step 3: Cross multiply
    320.18x = 479.73 × 228.72
  4. Step 4: Simplify right side
    320.18x = 109,723.85
  5. Step 5: Solve for x
    x = 109,723.85/320.18
  6. Step 6: Final answer
    x = 342.69

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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.