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Finding the Fourth Proportional to 500.10, 690.09 and 279.06

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Solution

The fourth proportional to 500.10, 690.09 and 279.06 is: 385.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.10 : 690.09 = 279.06 : x
  2. Step 2: Convert to fraction form
    500.10/690.09 = 279.06/x
  3. Step 3: Cross multiply
    500.10x = 690.09 × 279.06
  4. Step 4: Simplify right side
    500.10x = 192,576.52
  5. Step 5: Solve for x
    x = 192,576.52/500.10
  6. Step 6: Final answer
    x = 385.08

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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.