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Finding the Fourth Proportional to 535.05, 799.28 and 387.63

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Solution

The fourth proportional to 535.05, 799.28 and 387.63 is: 579.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    535.05 : 799.28 = 387.63 : x
  2. Step 2: Convert to fraction form
    535.05/799.28 = 387.63/x
  3. Step 3: Cross multiply
    535.05x = 799.28 × 387.63
  4. Step 4: Simplify right side
    535.05x = 309,822.97
  5. Step 5: Solve for x
    x = 309,822.97/535.05
  6. Step 6: Final answer
    x = 579.05

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.