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Finding the Fourth Proportional to 482.64, 723.78 and 208.68

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Solution

The fourth proportional to 482.64, 723.78 and 208.68 is: 312.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.64 : 723.78 = 208.68 : x
  2. Step 2: Convert to fraction form
    482.64/723.78 = 208.68/x
  3. Step 3: Cross multiply
    482.64x = 723.78 × 208.68
  4. Step 4: Simplify right side
    482.64x = 151,038.41
  5. Step 5: Solve for x
    x = 151,038.41/482.64
  6. Step 6: Final answer
    x = 312.94

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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.