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Finding the Fourth Proportional to 345.96, 477.36 and 214.88

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Solution

The fourth proportional to 345.96, 477.36 and 214.88 is: 296.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.96 : 477.36 = 214.88 : x
  2. Step 2: Convert to fraction form
    345.96/477.36 = 214.88/x
  3. Step 3: Cross multiply
    345.96x = 477.36 × 214.88
  4. Step 4: Simplify right side
    345.96x = 102,572.73
  5. Step 5: Solve for x
    x = 102,572.73/345.96
  6. Step 6: Final answer
    x = 296.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.