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Finding the Fourth Proportional to 500.07, 690.09 and 279.03

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Solution

The fourth proportional to 500.07, 690.09 and 279.03 is: 385.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.07 : 690.09 = 279.03 : x
  2. Step 2: Convert to fraction form
    500.07/690.09 = 279.03/x
  3. Step 3: Cross multiply
    500.07x = 690.09 × 279.03
  4. Step 4: Simplify right side
    500.07x = 192,555.81
  5. Step 5: Solve for x
    x = 192,555.81/500.07
  6. Step 6: Final answer
    x = 385.06

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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.