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Finding the Fourth Proportional to 835.26, 1,153.20 and 521

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Solution

The fourth proportional to 835.26, 1,153.20 and 521 is: 719.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    835.26 : 1,153.20 = 521 : x
  2. Step 2: Convert to fraction form
    835.26/1,153.20 = 521/x
  3. Step 3: Cross multiply
    835.26x = 1,153.20 × 521
  4. Step 4: Simplify right side
    835.26x = 600,817.20
  5. Step 5: Solve for x
    x = 600,817.20/835.26
  6. Step 6: Final answer
    x = 719.32

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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.