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Finding the Fourth Proportional to 644.90, 890.32 and 582.52

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Solution

The fourth proportional to 644.90, 890.32 and 582.52 is: 804.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.90 : 890.32 = 582.52 : x
  2. Step 2: Convert to fraction form
    644.90/890.32 = 582.52/x
  3. Step 3: Cross multiply
    644.90x = 890.32 × 582.52
  4. Step 4: Simplify right side
    644.90x = 518,629.21
  5. Step 5: Solve for x
    x = 518,629.21/644.90
  6. Step 6: Final answer
    x = 804.20

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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.