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Finding the Fourth Proportional to 767.05, 1,057.29 and 531.34

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Solution

The fourth proportional to 767.05, 1,057.29 and 531.34 is: 732.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    767.05 : 1,057.29 = 531.34 : x
  2. Step 2: Convert to fraction form
    767.05/1,057.29 = 531.34/x
  3. Step 3: Cross multiply
    767.05x = 1,057.29 × 531.34
  4. Step 4: Simplify right side
    767.05x = 561,775.83
  5. Step 5: Solve for x
    x = 561,775.83/767.05
  6. Step 6: Final answer
    x = 732.39

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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.