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Finding the Fourth Proportional to 657.50, 986.26 and 272.76

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Solution

The fourth proportional to 657.50, 986.26 and 272.76 is: 409.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.50 : 986.26 = 272.76 : x
  2. Step 2: Convert to fraction form
    657.50/986.26 = 272.76/x
  3. Step 3: Cross multiply
    657.50x = 986.26 × 272.76
  4. Step 4: Simplify right side
    657.50x = 269,012.28
  5. Step 5: Solve for x
    x = 269,012.28/657.50
  6. Step 6: Final answer
    x = 409.14

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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.