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Finding the Fourth Proportional to 657.52, 985.67 and 266.90

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Solution

The fourth proportional to 657.52, 985.67 and 266.90 is: 400.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.52 : 985.67 = 266.90 : x
  2. Step 2: Convert to fraction form
    657.52/985.67 = 266.90/x
  3. Step 3: Cross multiply
    657.52x = 985.67 × 266.90
  4. Step 4: Simplify right side
    657.52x = 263,070.06
  5. Step 5: Solve for x
    x = 263,070.06/657.52
  6. Step 6: Final answer
    x = 400.10

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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.