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Finding the Fourth Proportional to 482.80, 724.02 and 208.75

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Solution

The fourth proportional to 482.80, 724.02 and 208.75 is: 313.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.80 : 724.02 = 208.75 : x
  2. Step 2: Convert to fraction form
    482.80/724.02 = 208.75/x
  3. Step 3: Cross multiply
    482.80x = 724.02 × 208.75
  4. Step 4: Simplify right side
    482.80x = 151,139.18
  5. Step 5: Solve for x
    x = 151,139.18/482.80
  6. Step 6: Final answer
    x = 313.05

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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.