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Finding the Fourth Proportional to 836.06, 1,153.31 and 521.26

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Solution

The fourth proportional to 836.06, 1,153.31 and 521.26 is: 719.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.06 : 1,153.31 = 521.26 : x
  2. Step 2: Convert to fraction form
    836.06/1,153.31 = 521.26/x
  3. Step 3: Cross multiply
    836.06x = 1,153.31 × 521.26
  4. Step 4: Simplify right side
    836.06x = 601,168.88
  5. Step 5: Solve for x
    x = 601,168.88/836.06
  6. Step 6: Final answer
    x = 719.05

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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.