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Finding the Fourth Proportional to 500.25, 750.74 and 403.90

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Solution

The fourth proportional to 500.25, 750.74 and 403.90 is: 606.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.25 : 750.74 = 403.90 : x
  2. Step 2: Convert to fraction form
    500.25/750.74 = 403.90/x
  3. Step 3: Cross multiply
    500.25x = 750.74 × 403.90
  4. Step 4: Simplify right side
    500.25x = 303,227.62
  5. Step 5: Solve for x
    x = 303,227.62/500.25
  6. Step 6: Final answer
    x = 606.15

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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.