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Finding the Fourth Proportional to 435.27, 655.49 and 386.98

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Solution

The fourth proportional to 435.27, 655.49 and 386.98 is: 582.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.27 : 655.49 = 386.98 : x
  2. Step 2: Convert to fraction form
    435.27/655.49 = 386.98/x
  3. Step 3: Cross multiply
    435.27x = 655.49 × 386.98
  4. Step 4: Simplify right side
    435.27x = 253,660.85
  5. Step 5: Solve for x
    x = 253,660.85/435.27
  6. Step 6: Final answer
    x = 582.76

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.