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Finding the Fourth Proportional to 819.42, 1,131.06 and 525.48

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Solution

The fourth proportional to 819.42, 1,131.06 and 525.48 is: 725.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    819.42 : 1,131.06 = 525.48 : x
  2. Step 2: Convert to fraction form
    819.42/1,131.06 = 525.48/x
  3. Step 3: Cross multiply
    819.42x = 1,131.06 × 525.48
  4. Step 4: Simplify right side
    819.42x = 594,349.41
  5. Step 5: Solve for x
    x = 594,349.41/819.42
  6. Step 6: Final answer
    x = 725.33

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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.