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Finding the Fourth Proportional to 312.08, 469.84 and 216.56

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Solution

The fourth proportional to 312.08, 469.84 and 216.56 is: 326.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.08 : 469.84 = 216.56 : x
  2. Step 2: Convert to fraction form
    312.08/469.84 = 216.56/x
  3. Step 3: Cross multiply
    312.08x = 469.84 × 216.56
  4. Step 4: Simplify right side
    312.08x = 101,748.55
  5. Step 5: Solve for x
    x = 101,748.55/312.08
  6. Step 6: Final answer
    x = 326.03

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.