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Finding the Fourth Proportional to 500.05, 690.07 and 279.02

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Solution

The fourth proportional to 500.05, 690.07 and 279.02 is: 385.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.05 : 690.07 = 279.02 : x
  2. Step 2: Convert to fraction form
    500.05/690.07 = 279.02/x
  3. Step 3: Cross multiply
    500.05x = 690.07 × 279.02
  4. Step 4: Simplify right side
    500.05x = 192,540.23
  5. Step 5: Solve for x
    x = 192,540.23/500.05
  6. Step 6: Final answer
    x = 385.04

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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.