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Finding the Fourth Proportional to 479.31, 720.15 and 306.06

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Solution

The fourth proportional to 479.31, 720.15 and 306.06 is: 459.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.31 : 720.15 = 306.06 : x
  2. Step 2: Convert to fraction form
    479.31/720.15 = 306.06/x
  3. Step 3: Cross multiply
    479.31x = 720.15 × 306.06
  4. Step 4: Simplify right side
    479.31x = 220,409.11
  5. Step 5: Solve for x
    x = 220,409.11/479.31
  6. Step 6: Final answer
    x = 459.85

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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.