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Finding the Fourth Proportional to 578.02, 867.04 and 212.61

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Solution

The fourth proportional to 578.02, 867.04 and 212.61 is: 318.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.02 : 867.04 = 212.61 : x
  2. Step 2: Convert to fraction form
    578.02/867.04 = 212.61/x
  3. Step 3: Cross multiply
    578.02x = 867.04 × 212.61
  4. Step 4: Simplify right side
    578.02x = 184,341.37
  5. Step 5: Solve for x
    x = 184,341.37/578.02
  6. Step 6: Final answer
    x = 318.92

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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.