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Finding the Fourth Proportional to 549.40, 823.65 and 305.59

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Solution

The fourth proportional to 549.40, 823.65 and 305.59 is: 458.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.40 : 823.65 = 305.59 : x
  2. Step 2: Convert to fraction form
    549.40/823.65 = 305.59/x
  3. Step 3: Cross multiply
    549.40x = 823.65 × 305.59
  4. Step 4: Simplify right side
    549.40x = 251,699.20
  5. Step 5: Solve for x
    x = 251,699.20/549.40
  6. Step 6: Final answer
    x = 458.13

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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.