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Finding the Fourth Proportional to 650.24, 899.34 and 639.30

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Solution

The fourth proportional to 650.24, 899.34 and 639.30 is: 884.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    650.24 : 899.34 = 639.30 : x
  2. Step 2: Convert to fraction form
    650.24/899.34 = 639.30/x
  3. Step 3: Cross multiply
    650.24x = 899.34 × 639.30
  4. Step 4: Simplify right side
    650.24x = 574,948.06
  5. Step 5: Solve for x
    x = 574,948.06/650.24
  6. Step 6: Final answer
    x = 884.21

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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.