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Finding the Fourth Proportional to 637.99, 880.38 and 389.27

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Solution

The fourth proportional to 637.99, 880.38 and 389.27 is: 537.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.99 : 880.38 = 389.27 : x
  2. Step 2: Convert to fraction form
    637.99/880.38 = 389.27/x
  3. Step 3: Cross multiply
    637.99x = 880.38 × 389.27
  4. Step 4: Simplify right side
    637.99x = 342,707.72
  5. Step 5: Solve for x
    x = 342,707.72/637.99
  6. Step 6: Final answer
    x = 537.17

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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.