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Finding the Fourth Proportional to 637.17, 879.21 and 357.36

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Solution

The fourth proportional to 637.17, 879.21 and 357.36 is: 493.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.17 : 879.21 = 357.36 : x
  2. Step 2: Convert to fraction form
    637.17/879.21 = 357.36/x
  3. Step 3: Cross multiply
    637.17x = 879.21 × 357.36
  4. Step 4: Simplify right side
    637.17x = 314,194.49
  5. Step 5: Solve for x
    x = 314,194.49/637.17
  6. Step 6: Final answer
    x = 493.11

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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.