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Finding the Fourth Proportional to 599.91, 899.87 and 209.91

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Solution

The fourth proportional to 599.91, 899.87 and 209.91 is: 314.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    599.91 : 899.87 = 209.91 : x
  2. Step 2: Convert to fraction form
    599.91/899.87 = 209.91/x
  3. Step 3: Cross multiply
    599.91x = 899.87 × 209.91
  4. Step 4: Simplify right side
    599.91x = 188,890.16
  5. Step 5: Solve for x
    x = 188,890.16/599.91
  6. Step 6: Final answer
    x = 314.86

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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.