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Finding the Fourth Proportional to 212.50, 293.28 and 134.86

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Solution

The fourth proportional to 212.50, 293.28 and 134.86 is: 186.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.50 : 293.28 = 134.86 : x
  2. Step 2: Convert to fraction form
    212.50/293.28 = 134.86/x
  3. Step 3: Cross multiply
    212.50x = 293.28 × 134.86
  4. Step 4: Simplify right side
    212.50x = 39,551.74
  5. Step 5: Solve for x
    x = 39,551.74/212.50
  6. Step 6: Final answer
    x = 186.13

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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.