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Finding the Fourth Proportional to 619.52, 853.08 and 520.88

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Solution

The fourth proportional to 619.52, 853.08 and 520.88 is: 717.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.52 : 853.08 = 520.88 : x
  2. Step 2: Convert to fraction form
    619.52/853.08 = 520.88/x
  3. Step 3: Cross multiply
    619.52x = 853.08 × 520.88
  4. Step 4: Simplify right side
    619.52x = 444,352.31
  5. Step 5: Solve for x
    x = 444,352.31/619.52
  6. Step 6: Final answer
    x = 717.25

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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.