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Finding the Fourth Proportional to 935.21, 1,402.81 and 519.00

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Solution

The fourth proportional to 935.21, 1,402.81 and 519.00 is: 778.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    935.21 : 1,402.81 = 519.00 : x
  2. Step 2: Convert to fraction form
    935.21/1,402.81 = 519.00/x
  3. Step 3: Cross multiply
    935.21x = 1,402.81 × 519.00
  4. Step 4: Simplify right side
    935.21x = 728,057.24
  5. Step 5: Solve for x
    x = 728,057.24/935.21
  6. Step 6: Final answer
    x = 778.49

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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.