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Finding the Fourth Proportional to 519.10, 779.58 and 276.10

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Solution

The fourth proportional to 519.10, 779.58 and 276.10 is: 414.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.10 : 779.58 = 276.10 : x
  2. Step 2: Convert to fraction form
    519.10/779.58 = 276.10/x
  3. Step 3: Cross multiply
    519.10x = 779.58 × 276.10
  4. Step 4: Simplify right side
    519.10x = 215,242.04
  5. Step 5: Solve for x
    x = 215,242.04/519.10
  6. Step 6: Final answer
    x = 414.64

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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.