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Finding the Fourth Proportional to 499.56, 749.30 and 207.12

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Solution

The fourth proportional to 499.56, 749.30 and 207.12 is: 310.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    499.56 : 749.30 = 207.12 : x
  2. Step 2: Convert to fraction form
    499.56/749.30 = 207.12/x
  3. Step 3: Cross multiply
    499.56x = 749.30 × 207.12
  4. Step 4: Simplify right side
    499.56x = 155,195.02
  5. Step 5: Solve for x
    x = 155,195.02/499.56
  6. Step 6: Final answer
    x = 310.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.