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Finding the Fourth Proportional to 874.08, 1,309.91 and 549.27

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Solution

The fourth proportional to 874.08, 1,309.91 and 549.27 is: 823.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    874.08 : 1,309.91 = 549.27 : x
  2. Step 2: Convert to fraction form
    874.08/1,309.91 = 549.27/x
  3. Step 3: Cross multiply
    874.08x = 1,309.91 × 549.27
  4. Step 4: Simplify right side
    874.08x = 719,491.52
  5. Step 5: Solve for x
    x = 719,491.52/874.08
  6. Step 6: Final answer
    x = 823.14

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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.