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Finding the Fourth Proportional to 487.77, 673.13 and 266.72

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Solution

The fourth proportional to 487.77, 673.13 and 266.72 is: 368.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.77 : 673.13 = 266.72 : x
  2. Step 2: Convert to fraction form
    487.77/673.13 = 266.72/x
  3. Step 3: Cross multiply
    487.77x = 673.13 × 266.72
  4. Step 4: Simplify right side
    487.77x = 179,537.23
  5. Step 5: Solve for x
    x = 179,537.23/487.77
  6. Step 6: Final answer
    x = 368.08

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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.