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Finding the Fourth Proportional to 644.82, 890.64 and 458.52

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Solution

The fourth proportional to 644.82, 890.64 and 458.52 is: 633.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.82 : 890.64 = 458.52 : x
  2. Step 2: Convert to fraction form
    644.82/890.64 = 458.52/x
  3. Step 3: Cross multiply
    644.82x = 890.64 × 458.52
  4. Step 4: Simplify right side
    644.82x = 408,376.25
  5. Step 5: Solve for x
    x = 408,376.25/644.82
  6. Step 6: Final answer
    x = 633.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.