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Finding the Fourth Proportional to 483.49, 725.94 and 319.45

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Solution

The fourth proportional to 483.49, 725.94 and 319.45 is: 479.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.49 : 725.94 = 319.45 : x
  2. Step 2: Convert to fraction form
    483.49/725.94 = 319.45/x
  3. Step 3: Cross multiply
    483.49x = 725.94 × 319.45
  4. Step 4: Simplify right side
    483.49x = 231,901.53
  5. Step 5: Solve for x
    x = 231,901.53/483.49
  6. Step 6: Final answer
    x = 479.64

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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.