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Finding the Fourth Proportional to 500.22, 750.74 and 257.22

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Solution

The fourth proportional to 500.22, 750.74 and 257.22 is: 386.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.22 : 750.74 = 257.22 : x
  2. Step 2: Convert to fraction form
    500.22/750.74 = 257.22/x
  3. Step 3: Cross multiply
    500.22x = 750.74 × 257.22
  4. Step 4: Simplify right side
    500.22x = 193,104.06
  5. Step 5: Solve for x
    x = 193,104.06/500.22
  6. Step 6: Final answer
    x = 386.04

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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.