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Finding the Fourth Proportional to 500.25, 690.37 and 279.23

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Solution

The fourth proportional to 500.25, 690.37 and 279.23 is: 385.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.25 : 690.37 = 279.23 : x
  2. Step 2: Convert to fraction form
    500.25/690.37 = 279.23/x
  3. Step 3: Cross multiply
    500.25x = 690.37 × 279.23
  4. Step 4: Simplify right side
    500.25x = 192,772.02
  5. Step 5: Solve for x
    x = 192,772.02/500.25
  6. Step 6: Final answer
    x = 385.35

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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.