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Finding the Fourth Proportional to 389.81, 585.02 and 173.44

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Solution

The fourth proportional to 389.81, 585.02 and 173.44 is: 260.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.81 : 585.02 = 173.44 : x
  2. Step 2: Convert to fraction form
    389.81/585.02 = 173.44/x
  3. Step 3: Cross multiply
    389.81x = 585.02 × 173.44
  4. Step 4: Simplify right side
    389.81x = 101,467.03
  5. Step 5: Solve for x
    x = 101,467.03/389.81
  6. Step 6: Final answer
    x = 260.30

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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.