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Finding the Fourth Proportional to 519.04, 777.28 and 386.95

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Solution

The fourth proportional to 519.04, 777.28 and 386.95 is: 579.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.04 : 777.28 = 386.95 : x
  2. Step 2: Convert to fraction form
    519.04/777.28 = 386.95/x
  3. Step 3: Cross multiply
    519.04x = 777.28 × 386.95
  4. Step 4: Simplify right side
    519.04x = 300,770.32
  5. Step 5: Solve for x
    x = 300,770.32/519.04
  6. Step 6: Final answer
    x = 579.47

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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.