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Finding the Fourth Proportional to 500.01, 690.05 and 279.00

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Solution

The fourth proportional to 500.01, 690.05 and 279.00 is: 385.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.01 : 690.05 = 279.00 : x
  2. Step 2: Convert to fraction form
    500.01/690.05 = 279.00/x
  3. Step 3: Cross multiply
    500.01x = 690.05 × 279.00
  4. Step 4: Simplify right side
    500.01x = 192,523.42
  5. Step 5: Solve for x
    x = 192,523.42/500.01
  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.