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Finding the Fourth Proportional to 762.76, 1,141.26 and 545.56

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Solution

The fourth proportional to 762.76, 1,141.26 and 545.56 is: 816.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.76 : 1,141.26 = 545.56 : x
  2. Step 2: Convert to fraction form
    762.76/1,141.26 = 545.56/x
  3. Step 3: Cross multiply
    762.76x = 1,141.26 × 545.56
  4. Step 4: Simplify right side
    762.76x = 622,625.81
  5. Step 5: Solve for x
    x = 622,625.81/762.76
  6. Step 6: Final answer
    x = 816.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.