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Finding the Fourth Proportional to 874.23, 1,308.78 and 565.62

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Solution

The fourth proportional to 874.23, 1,308.78 and 565.62 is: 846.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    874.23 : 1,308.78 = 565.62 : x
  2. Step 2: Convert to fraction form
    874.23/1,308.78 = 565.62/x
  3. Step 3: Cross multiply
    874.23x = 1,308.78 × 565.62
  4. Step 4: Simplify right side
    874.23x = 740,272.14
  5. Step 5: Solve for x
    x = 740,272.14/874.23
  6. Step 6: Final answer
    x = 846.77

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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.