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Finding the Fourth Proportional to 482.79, 724.03 and 208.81

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Solution

The fourth proportional to 482.79, 724.03 and 208.81 is: 313.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.79 : 724.03 = 208.81 : x
  2. Step 2: Convert to fraction form
    482.79/724.03 = 208.81/x
  3. Step 3: Cross multiply
    482.79x = 724.03 × 208.81
  4. Step 4: Simplify right side
    482.79x = 151,184.70
  5. Step 5: Solve for x
    x = 151,184.70/482.79
  6. Step 6: Final answer
    x = 313.15

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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.