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Finding the Fourth Proportional to 549.86, 823.47 and 318.26

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Solution

The fourth proportional to 549.86, 823.47 and 318.26 is: 476.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.86 : 823.47 = 318.26 : x
  2. Step 2: Convert to fraction form
    549.86/823.47 = 318.26/x
  3. Step 3: Cross multiply
    549.86x = 823.47 × 318.26
  4. Step 4: Simplify right side
    549.86x = 262,077.56
  5. Step 5: Solve for x
    x = 262,077.56/549.86
  6. Step 6: Final answer
    x = 476.63

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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.