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Finding the Fourth Proportional to 389.16, 583.34 and 252.29

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Solution

The fourth proportional to 389.16, 583.34 and 252.29 is: 378.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.16 : 583.34 = 252.29 : x
  2. Step 2: Convert to fraction form
    389.16/583.34 = 252.29/x
  3. Step 3: Cross multiply
    389.16x = 583.34 × 252.29
  4. Step 4: Simplify right side
    389.16x = 147,169.07
  5. Step 5: Solve for x
    x = 147,169.07/389.16
  6. Step 6: Final answer
    x = 378.18

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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.