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Finding the Fourth Proportional to 677.28, 933.27 and 519.90

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Solution

The fourth proportional to 677.28, 933.27 and 519.90 is: 716.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    677.28 : 933.27 = 519.90 : x
  2. Step 2: Convert to fraction form
    677.28/933.27 = 519.90/x
  3. Step 3: Cross multiply
    677.28x = 933.27 × 519.90
  4. Step 4: Simplify right side
    677.28x = 485,207.07
  5. Step 5: Solve for x
    x = 485,207.07/677.28
  6. Step 6: Final answer
    x = 716.41

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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.