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Finding the Fourth Proportional to 482.46, 724.09 and 208.76

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Solution

The fourth proportional to 482.46, 724.09 and 208.76 is: 313.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.46 : 724.09 = 208.76 : x
  2. Step 2: Convert to fraction form
    482.46/724.09 = 208.76/x
  3. Step 3: Cross multiply
    482.46x = 724.09 × 208.76
  4. Step 4: Simplify right side
    482.46x = 151,156.89
  5. Step 5: Solve for x
    x = 151,156.89/482.46
  6. Step 6: Final answer
    x = 313.31

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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.