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Finding the Fourth Proportional to 637.09, 878.90 and 374.99

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Solution

The fourth proportional to 637.09, 878.90 and 374.99 is: 517.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.09 : 878.90 = 374.99 : x
  2. Step 2: Convert to fraction form
    637.09/878.90 = 374.99/x
  3. Step 3: Cross multiply
    637.09x = 878.90 × 374.99
  4. Step 4: Simplify right side
    637.09x = 329,578.71
  5. Step 5: Solve for x
    x = 329,578.71/637.09
  6. Step 6: Final answer
    x = 517.32

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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.