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Finding the Fourth Proportional to 835.98, 1,154.22 and 521.72

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Solution

The fourth proportional to 835.98, 1,154.22 and 521.72 is: 720.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    835.98 : 1,154.22 = 521.72 : x
  2. Step 2: Convert to fraction form
    835.98/1,154.22 = 521.72/x
  3. Step 3: Cross multiply
    835.98x = 1,154.22 × 521.72
  4. Step 4: Simplify right side
    835.98x = 602,180.59
  5. Step 5: Solve for x
    x = 602,180.59/835.98
  6. Step 6: Final answer
    x = 720.33

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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.