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Finding the Fourth Proportional to 345.50, 476.84 and 212.71

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Solution

The fourth proportional to 345.50, 476.84 and 212.71 is: 293.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.50 : 476.84 = 212.71 : x
  2. Step 2: Convert to fraction form
    345.50/476.84 = 212.71/x
  3. Step 3: Cross multiply
    345.50x = 476.84 × 212.71
  4. Step 4: Simplify right side
    345.50x = 101,428.64
  5. Step 5: Solve for x
    x = 101,428.64/345.50
  6. Step 6: Final answer
    x = 293.57

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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.