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Finding the Fourth Proportional to 644.77, 968.40 and 552.43

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Solution

The fourth proportional to 644.77, 968.40 and 552.43 is: 829.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.77 : 968.40 = 552.43 : x
  2. Step 2: Convert to fraction form
    644.77/968.40 = 552.43/x
  3. Step 3: Cross multiply
    644.77x = 968.40 × 552.43
  4. Step 4: Simplify right side
    644.77x = 534,973.21
  5. Step 5: Solve for x
    x = 534,973.21/644.77
  6. Step 6: Final answer
    x = 829.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.