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Finding the Fourth Proportional to 501.25, 752.18 and 212.69

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Solution

The fourth proportional to 501.25, 752.18 and 212.69 is: 319.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    501.25 : 752.18 = 212.69 : x
  2. Step 2: Convert to fraction form
    501.25/752.18 = 212.69/x
  3. Step 3: Cross multiply
    501.25x = 752.18 × 212.69
  4. Step 4: Simplify right side
    501.25x = 159,979.82
  5. Step 5: Solve for x
    x = 159,979.82/501.25
  6. Step 6: Final answer
    x = 319.16

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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.