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Finding the Fourth Proportional to 519, 779.64 and 498.18

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Solution

The fourth proportional to 519, 779.64 and 498.18 is: 748.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    519 : 779.64 = 498.18 : x
  2. Step 2: Convert to fraction form
    519/779.64 = 498.18/x
  3. Step 3: Cross multiply
    519x = 779.64 × 498.18
  4. Step 4: Simplify right side
    519x = 388,401.06
  5. Step 5: Solve for x
    x = 388,401.06/519
  6. Step 6: Final answer
    x = 748.36

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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.