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Finding the Fourth Proportional to 519.88, 779.01 and 417.82

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Solution

The fourth proportional to 519.88, 779.01 and 417.82 is: 626.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.88 : 779.01 = 417.82 : x
  2. Step 2: Convert to fraction form
    519.88/779.01 = 417.82/x
  3. Step 3: Cross multiply
    519.88x = 779.01 × 417.82
  4. Step 4: Simplify right side
    519.88x = 325,485.96
  5. Step 5: Solve for x
    x = 325,485.96/519.88
  6. Step 6: Final answer
    x = 626.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.