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Finding the Fourth Proportional to 627.75, 859.86 and 619.83

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Solution

The fourth proportional to 627.75, 859.86 and 619.83 is: 849.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.75 : 859.86 = 619.83 : x
  2. Step 2: Convert to fraction form
    627.75/859.86 = 619.83/x
  3. Step 3: Cross multiply
    627.75x = 859.86 × 619.83
  4. Step 4: Simplify right side
    627.75x = 532,967.02
  5. Step 5: Solve for x
    x = 532,967.02/627.75
  6. Step 6: Final answer
    x = 849.01

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.