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Finding the Fourth Proportional to 549.86, 825.20 and 203.40

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Solution

The fourth proportional to 549.86, 825.20 and 203.40 is: 305.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.86 : 825.20 = 203.40 : x
  2. Step 2: Convert to fraction form
    549.86/825.20 = 203.40/x
  3. Step 3: Cross multiply
    549.86x = 825.20 × 203.40
  4. Step 4: Simplify right side
    549.86x = 167,848.25
  5. Step 5: Solve for x
    x = 167,848.25/549.86
  6. Step 6: Final answer
    x = 305.26

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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.