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Finding the Fourth Proportional to 764.17, 1,143.82 and 545.20

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Solution

The fourth proportional to 764.17, 1,143.82 and 545.20 is: 816.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    764.17 : 1,143.82 = 545.20 : x
  2. Step 2: Convert to fraction form
    764.17/1,143.82 = 545.20/x
  3. Step 3: Cross multiply
    764.17x = 1,143.82 × 545.20
  4. Step 4: Simplify right side
    764.17x = 623,610.66
  5. Step 5: Solve for x
    x = 623,610.66/764.17
  6. Step 6: Final answer
    x = 816.06

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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.