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Finding the Fourth Proportional to 500.89, 690.60 and 376.15

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Solution

The fourth proportional to 500.89, 690.60 and 376.15 is: 518.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.89 : 690.60 = 376.15 : x
  2. Step 2: Convert to fraction form
    500.89/690.60 = 376.15/x
  3. Step 3: Cross multiply
    500.89x = 690.60 × 376.15
  4. Step 4: Simplify right side
    500.89x = 259,768.87
  5. Step 5: Solve for x
    x = 259,768.87/500.89
  6. Step 6: Final answer
    x = 518.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.