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Finding the Fourth Proportional to 637.40, 879.74 and 375.56

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Solution

The fourth proportional to 637.40, 879.74 and 375.56 is: 518.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.40 : 879.74 = 375.56 : x
  2. Step 2: Convert to fraction form
    637.40/879.74 = 375.56/x
  3. Step 3: Cross multiply
    637.40x = 879.74 × 375.56
  4. Step 4: Simplify right side
    637.40x = 330,393.28
  5. Step 5: Solve for x
    x = 330,393.28/637.40
  6. Step 6: Final answer
    x = 518.35

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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.