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Finding the Fourth Proportional to 501.51, 752.21 and 212.73

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Solution

The fourth proportional to 501.51, 752.21 and 212.73 is: 319.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    501.51 : 752.21 = 212.73 : x
  2. Step 2: Convert to fraction form
    501.51/752.21 = 212.73/x
  3. Step 3: Cross multiply
    501.51x = 752.21 × 212.73
  4. Step 4: Simplify right side
    501.51x = 160,016.57
  5. Step 5: Solve for x
    x = 160,016.57/501.51
  6. Step 6: Final answer
    x = 319.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.