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Finding the Fourth Proportional to 487.39, 726.79 and 483

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Solution

The fourth proportional to 487.39, 726.79 and 483 is: 720.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.39 : 726.79 = 483 : x
  2. Step 2: Convert to fraction form
    487.39/726.79 = 483/x
  3. Step 3: Cross multiply
    487.39x = 726.79 × 483
  4. Step 4: Simplify right side
    487.39x = 351,039.57
  5. Step 5: Solve for x
    x = 351,039.57/487.39
  6. Step 6: Final answer
    x = 720.24

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.