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Finding the Fourth Proportional to 619.88, 855.43 and 567.59

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Solution

The fourth proportional to 619.88, 855.43 and 567.59 is: 783.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.88 : 855.43 = 567.59 : x
  2. Step 2: Convert to fraction form
    619.88/855.43 = 567.59/x
  3. Step 3: Cross multiply
    619.88x = 855.43 × 567.59
  4. Step 4: Simplify right side
    619.88x = 485,527.82
  5. Step 5: Solve for x
    x = 485,527.82/619.88
  6. Step 6: Final answer
    x = 783.27

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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.