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Finding the Fourth Proportional to 487.78, 673.13 and 266.73

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Solution

The fourth proportional to 487.78, 673.13 and 266.73 is: 368.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.78 : 673.13 = 266.73 : x
  2. Step 2: Convert to fraction form
    487.78/673.13 = 266.73/x
  3. Step 3: Cross multiply
    487.78x = 673.13 × 266.73
  4. Step 4: Simplify right side
    487.78x = 179,539.27
  5. Step 5: Solve for x
    x = 179,539.27/487.78
  6. Step 6: Final answer
    x = 368.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.