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Finding the Fourth Proportional to 578.29, 867.13 and 395.74

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Solution

The fourth proportional to 578.29, 867.13 and 395.74 is: 593.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.29 : 867.13 = 395.74 : x
  2. Step 2: Convert to fraction form
    578.29/867.13 = 395.74/x
  3. Step 3: Cross multiply
    578.29x = 867.13 × 395.74
  4. Step 4: Simplify right side
    578.29x = 343,158.03
  5. Step 5: Solve for x
    x = 343,158.03/578.29
  6. Step 6: Final answer
    x = 593.40

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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.