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Finding the Fourth Proportional to 677.52, 1,015.92 and 266.64

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Solution

The fourth proportional to 677.52, 1,015.92 and 266.64 is: 399.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    677.52 : 1,015.92 = 266.64 : x
  2. Step 2: Convert to fraction form
    677.52/1,015.92 = 266.64/x
  3. Step 3: Cross multiply
    677.52x = 1,015.92 × 266.64
  4. Step 4: Simplify right side
    677.52x = 270,884.91
  5. Step 5: Solve for x
    x = 270,884.91/677.52
  6. Step 6: Final answer
    x = 399.82

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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.