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Finding the Fourth Proportional to 500.22, 750.12 and 211.50

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Solution

The fourth proportional to 500.22, 750.12 and 211.50 is: 317.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.22 : 750.12 = 211.50 : x
  2. Step 2: Convert to fraction form
    500.22/750.12 = 211.50/x
  3. Step 3: Cross multiply
    500.22x = 750.12 × 211.50
  4. Step 4: Simplify right side
    500.22x = 158,650.38
  5. Step 5: Solve for x
    x = 158,650.38/500.22
  6. Step 6: Final answer
    x = 317.16

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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.