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Finding the Fourth Proportional to 637.26, 879.30 and 440.70

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Solution

The fourth proportional to 637.26, 879.30 and 440.70 is: 608.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.26 : 879.30 = 440.70 : x
  2. Step 2: Convert to fraction form
    637.26/879.30 = 440.70/x
  3. Step 3: Cross multiply
    637.26x = 879.30 × 440.70
  4. Step 4: Simplify right side
    637.26x = 387,507.51
  5. Step 5: Solve for x
    x = 387,507.51/637.26
  6. Step 6: Final answer
    x = 608.08

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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.