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Finding the Fourth Proportional to 535.40, 799.72 and 426.88

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Solution

The fourth proportional to 535.40, 799.72 and 426.88 is: 637.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    535.40 : 799.72 = 426.88 : x
  2. Step 2: Convert to fraction form
    535.40/799.72 = 426.88/x
  3. Step 3: Cross multiply
    535.40x = 799.72 × 426.88
  4. Step 4: Simplify right side
    535.40x = 341,384.47
  5. Step 5: Solve for x
    x = 341,384.47/535.40
  6. Step 6: Final answer
    x = 637.63

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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.