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Finding the Fourth Proportional to 635.04, 879.84 and 619.20

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Solution

The fourth proportional to 635.04, 879.84 and 619.20 is: 857.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.04 : 879.84 = 619.20 : x
  2. Step 2: Convert to fraction form
    635.04/879.84 = 619.20/x
  3. Step 3: Cross multiply
    635.04x = 879.84 × 619.20
  4. Step 4: Simplify right side
    635.04x = 544,796.93
  5. Step 5: Solve for x
    x = 544,796.93/635.04
  6. Step 6: Final answer
    x = 857.89

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.