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Finding the Fourth Proportional to 214.24, 320.96 and 145.76

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Solution

The fourth proportional to 214.24, 320.96 and 145.76 is: 218.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    214.24 : 320.96 = 145.76 : x
  2. Step 2: Convert to fraction form
    214.24/320.96 = 145.76/x
  3. Step 3: Cross multiply
    214.24x = 320.96 × 145.76
  4. Step 4: Simplify right side
    214.24x = 46,783.13
  5. Step 5: Solve for x
    x = 46,783.13/214.24
  6. Step 6: Final answer
    x = 218.37

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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.