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Finding the Fourth Proportional to 500.38, 690.42 and 301.24

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Solution

The fourth proportional to 500.38, 690.42 and 301.24 is: 415.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.38 : 690.42 = 301.24 : x
  2. Step 2: Convert to fraction form
    500.38/690.42 = 301.24/x
  3. Step 3: Cross multiply
    500.38x = 690.42 × 301.24
  4. Step 4: Simplify right side
    500.38x = 207,982.12
  5. Step 5: Solve for x
    x = 207,982.12/500.38
  6. Step 6: Final answer
    x = 415.65

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1.5x scale

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.