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Finding the Fourth Proportional to 650.24, 898.41 and 643.75

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Solution

The fourth proportional to 650.24, 898.41 and 643.75 is: 889.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    650.24 : 898.41 = 643.75 : x
  2. Step 2: Convert to fraction form
    650.24/898.41 = 643.75/x
  3. Step 3: Cross multiply
    650.24x = 898.41 × 643.75
  4. Step 4: Simplify right side
    650.24x = 578,351.44
  5. Step 5: Solve for x
    x = 578,351.44/650.24
  6. Step 6: Final answer
    x = 889.44

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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.