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Finding the Fourth Proportional to 644.42, 890.36 and 573.86

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Solution

The fourth proportional to 644.42, 890.36 and 573.86 is: 792.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.42 : 890.36 = 573.86 : x
  2. Step 2: Convert to fraction form
    644.42/890.36 = 573.86/x
  3. Step 3: Cross multiply
    644.42x = 890.36 × 573.86
  4. Step 4: Simplify right side
    644.42x = 510,941.99
  5. Step 5: Solve for x
    x = 510,941.99/644.42
  6. Step 6: Final answer
    x = 792.87

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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.