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Finding the Fourth Proportional to 874.21, 1,311.77 and 565.98

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Solution

The fourth proportional to 874.21, 1,311.77 and 565.98 is: 849.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    874.21 : 1,311.77 = 565.98 : x
  2. Step 2: Convert to fraction form
    874.21/1,311.77 = 565.98/x
  3. Step 3: Cross multiply
    874.21x = 1,311.77 × 565.98
  4. Step 4: Simplify right side
    874.21x = 742,434.18
  5. Step 5: Solve for x
    x = 742,434.18/874.21
  6. Step 6: Final answer
    x = 849.26

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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.