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Finding the Fourth Proportional to 603, 904.59 and 213.11

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Solution

The fourth proportional to 603, 904.59 and 213.11 is: 319.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    603 : 904.59 = 213.11 : x
  2. Step 2: Convert to fraction form
    603/904.59 = 213.11/x
  3. Step 3: Cross multiply
    603x = 904.59 × 213.11
  4. Step 4: Simplify right side
    603x = 192,772.65
  5. Step 5: Solve for x
    x = 192,772.65/603
  6. Step 6: Final answer
    x = 319.69

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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.