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Finding the Fourth Proportional to 320.32, 479.77 and 274.76

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Solution

The fourth proportional to 320.32, 479.77 and 274.76 is: 411.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.32 : 479.77 = 274.76 : x
  2. Step 2: Convert to fraction form
    320.32/479.77 = 274.76/x
  3. Step 3: Cross multiply
    320.32x = 479.77 × 274.76
  4. Step 4: Simplify right side
    320.32x = 131,821.61
  5. Step 5: Solve for x
    x = 131,821.61/320.32
  6. Step 6: Final answer
    x = 411.53

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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.