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Finding the Fourth Proportional to 460.14, 690.36 and 426.42

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Solution

The fourth proportional to 460.14, 690.36 and 426.42 is: 639.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    460.14 : 690.36 = 426.42 : x
  2. Step 2: Convert to fraction form
    460.14/690.36 = 426.42/x
  3. Step 3: Cross multiply
    460.14x = 690.36 × 426.42
  4. Step 4: Simplify right side
    460.14x = 294,383.31
  5. Step 5: Solve for x
    x = 294,383.31/460.14
  6. Step 6: Final answer
    x = 639.77

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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.