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Finding the Fourth Proportional to 684.29, 944.52 and 389.72

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Solution

The fourth proportional to 684.29, 944.52 and 389.72 is: 537.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.29 : 944.52 = 389.72 : x
  2. Step 2: Convert to fraction form
    684.29/944.52 = 389.72/x
  3. Step 3: Cross multiply
    684.29x = 944.52 × 389.72
  4. Step 4: Simplify right side
    684.29x = 368,098.33
  5. Step 5: Solve for x
    x = 368,098.33/684.29
  6. Step 6: Final answer
    x = 537.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.