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Finding the Fourth Proportional to 578.08, 865.74 and 317.68

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Solution

The fourth proportional to 578.08, 865.74 and 317.68 is: 475.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.08 : 865.74 = 317.68 : x
  2. Step 2: Convert to fraction form
    578.08/865.74 = 317.68/x
  3. Step 3: Cross multiply
    578.08x = 865.74 × 317.68
  4. Step 4: Simplify right side
    578.08x = 275,028.28
  5. Step 5: Solve for x
    x = 275,028.28/578.08
  6. Step 6: Final answer
    x = 475.76

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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.