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Finding the Fourth Proportional to 909.21, 1,254.37 and 535.96

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Solution

The fourth proportional to 909.21, 1,254.37 and 535.96 is: 739.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    909.21 : 1,254.37 = 535.96 : x
  2. Step 2: Convert to fraction form
    909.21/1,254.37 = 535.96/x
  3. Step 3: Cross multiply
    909.21x = 1,254.37 × 535.96
  4. Step 4: Simplify right side
    909.21x = 672,292.15
  5. Step 5: Solve for x
    x = 672,292.15/909.21
  6. Step 6: Final answer
    x = 739.42

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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.