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Finding the Fourth Proportional to 272.59, 407.85 and 214.18

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Solution

The fourth proportional to 272.59, 407.85 and 214.18 is: 320.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.59 : 407.85 = 214.18 : x
  2. Step 2: Convert to fraction form
    272.59/407.85 = 214.18/x
  3. Step 3: Cross multiply
    272.59x = 407.85 × 214.18
  4. Step 4: Simplify right side
    272.59x = 87,353.31
  5. Step 5: Solve for x
    x = 87,353.31/272.59
  6. Step 6: Final answer
    x = 320.46

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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.