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Finding the Fourth Proportional to 762.83, 1,143.42 and 545.75

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Solution

The fourth proportional to 762.83, 1,143.42 and 545.75 is: 818.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.83 : 1,143.42 = 545.75 : x
  2. Step 2: Convert to fraction form
    762.83/1,143.42 = 545.75/x
  3. Step 3: Cross multiply
    762.83x = 1,143.42 × 545.75
  4. Step 4: Simplify right side
    762.83x = 624,017.11
  5. Step 5: Solve for x
    x = 624,017.11/762.83
  6. Step 6: Final answer
    x = 818.03

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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.