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Finding the Fourth Proportional to 345.96, 477.30 and 211.32

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Solution

The fourth proportional to 345.96, 477.30 and 211.32 is: 291.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.96 : 477.30 = 211.32 : x
  2. Step 2: Convert to fraction form
    345.96/477.30 = 211.32/x
  3. Step 3: Cross multiply
    345.96x = 477.30 × 211.32
  4. Step 4: Simplify right side
    345.96x = 100,863.04
  5. Step 5: Solve for x
    x = 100,863.04/345.96
  6. Step 6: Final answer
    x = 291.55

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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.