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Finding the Fourth Proportional to 499.89, 747.59 and 445.38

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Solution

The fourth proportional to 499.89, 747.59 and 445.38 is: 666.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    499.89 : 747.59 = 445.38 : x
  2. Step 2: Convert to fraction form
    499.89/747.59 = 445.38/x
  3. Step 3: Cross multiply
    499.89x = 747.59 × 445.38
  4. Step 4: Simplify right side
    499.89x = 332,959.41
  5. Step 5: Solve for x
    x = 332,959.41/499.89
  6. Step 6: Final answer
    x = 666.07

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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.