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Finding the Fourth Proportional to 578.65, 867.44 and 231.90

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Solution

The fourth proportional to 578.65, 867.44 and 231.90 is: 347.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.65 : 867.44 = 231.90 : x
  2. Step 2: Convert to fraction form
    578.65/867.44 = 231.90/x
  3. Step 3: Cross multiply
    578.65x = 867.44 × 231.90
  4. Step 4: Simplify right side
    578.65x = 201,159.34
  5. Step 5: Solve for x
    x = 201,159.34/578.65
  6. Step 6: Final answer
    x = 347.64

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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.