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Finding the Fourth Proportional to 295.71, 407.90 and 212.69

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Solution

The fourth proportional to 295.71, 407.90 and 212.69 is: 293.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    295.71 : 407.90 = 212.69 : x
  2. Step 2: Convert to fraction form
    295.71/407.90 = 212.69/x
  3. Step 3: Cross multiply
    295.71x = 407.90 × 212.69
  4. Step 4: Simplify right side
    295.71x = 86,753.15
  5. Step 5: Solve for x
    x = 86,753.15/295.71
  6. Step 6: Final answer
    x = 293.37

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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.