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Finding the Fourth Proportional to 368.20, 549.64 and 324.15

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Solution

The fourth proportional to 368.20, 549.64 and 324.15 is: 483.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.20 : 549.64 = 324.15 : x
  2. Step 2: Convert to fraction form
    368.20/549.64 = 324.15/x
  3. Step 3: Cross multiply
    368.20x = 549.64 × 324.15
  4. Step 4: Simplify right side
    368.20x = 178,165.81
  5. Step 5: Solve for x
    x = 178,165.81/368.20
  6. Step 6: Final answer
    x = 483.88

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.