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Finding the Fourth Proportional to 649.72, 896.93 and 440.99

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Solution

The fourth proportional to 649.72, 896.93 and 440.99 is: 608.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.72 : 896.93 = 440.99 : x
  2. Step 2: Convert to fraction form
    649.72/896.93 = 440.99/x
  3. Step 3: Cross multiply
    649.72x = 896.93 × 440.99
  4. Step 4: Simplify right side
    649.72x = 395,537.16
  5. Step 5: Solve for x
    x = 395,537.16/649.72
  6. Step 6: Final answer
    x = 608.78

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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.