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Finding the Fourth Proportional to 578.07, 867.04 and 207.90

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Solution

The fourth proportional to 578.07, 867.04 and 207.90 is: 311.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.07 : 867.04 = 207.90 : x
  2. Step 2: Convert to fraction form
    578.07/867.04 = 207.90/x
  3. Step 3: Cross multiply
    578.07x = 867.04 × 207.90
  4. Step 4: Simplify right side
    578.07x = 180,257.10
  5. Step 5: Solve for x
    x = 180,257.10/578.07
  6. Step 6: Final answer
    x = 311.83

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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.