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Finding the Fourth Proportional to 320.96, 479.01 and 312.76

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Solution

The fourth proportional to 320.96, 479.01 and 312.76 is: 466.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.96 : 479.01 = 312.76 : x
  2. Step 2: Convert to fraction form
    320.96/479.01 = 312.76/x
  3. Step 3: Cross multiply
    320.96x = 479.01 × 312.76
  4. Step 4: Simplify right side
    320.96x = 149,815.17
  5. Step 5: Solve for x
    x = 149,815.17/320.96
  6. Step 6: Final answer
    x = 466.77

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.