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Finding the Fourth Proportional to 458.49, 687.27 and 403.82

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Solution

The fourth proportional to 458.49, 687.27 and 403.82 is: 605.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.49 : 687.27 = 403.82 : x
  2. Step 2: Convert to fraction form
    458.49/687.27 = 403.82/x
  3. Step 3: Cross multiply
    458.49x = 687.27 × 403.82
  4. Step 4: Simplify right side
    458.49x = 277,533.37
  5. Step 5: Solve for x
    x = 277,533.37/458.49
  6. Step 6: Final answer
    x = 605.32

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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.