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Finding the Fourth Proportional to 426.32, 635.08 and 399.76

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Solution

The fourth proportional to 426.32, 635.08 and 399.76 is: 595.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.32 : 635.08 = 399.76 : x
  2. Step 2: Convert to fraction form
    426.32/635.08 = 399.76/x
  3. Step 3: Cross multiply
    426.32x = 635.08 × 399.76
  4. Step 4: Simplify right side
    426.32x = 253,879.58
  5. Step 5: Solve for x
    x = 253,879.58/426.32
  6. Step 6: Final answer
    x = 595.51

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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.