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Finding the Fourth Proportional to 487.73, 726.17 and 485.30

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Solution

The fourth proportional to 487.73, 726.17 and 485.30 is: 722.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.73 : 726.17 = 485.30 : x
  2. Step 2: Convert to fraction form
    487.73/726.17 = 485.30/x
  3. Step 3: Cross multiply
    487.73x = 726.17 × 485.30
  4. Step 4: Simplify right side
    487.73x = 352,410.30
  5. Step 5: Solve for x
    x = 352,410.30/487.73
  6. Step 6: Final answer
    x = 722.55

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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.