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Finding the Fourth Proportional to 846.23, 1,266.87 and 520.61

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Solution

The fourth proportional to 846.23, 1,266.87 and 520.61 is: 779.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    846.23 : 1,266.87 = 520.61 : x
  2. Step 2: Convert to fraction form
    846.23/1,266.87 = 520.61/x
  3. Step 3: Cross multiply
    846.23x = 1,266.87 × 520.61
  4. Step 4: Simplify right side
    846.23x = 659,545.19
  5. Step 5: Solve for x
    x = 659,545.19/846.23
  6. Step 6: Final answer
    x = 779.39

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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.