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Finding the Fourth Proportional to 629.68, 947.84 and 574.31

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Solution

The fourth proportional to 629.68, 947.84 and 574.31 is: 864.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.68 : 947.84 = 574.31 : x
  2. Step 2: Convert to fraction form
    629.68/947.84 = 574.31/x
  3. Step 3: Cross multiply
    629.68x = 947.84 × 574.31
  4. Step 4: Simplify right side
    629.68x = 544,353.99
  5. Step 5: Solve for x
    x = 544,353.99/629.68
  6. Step 6: Final answer
    x = 864.49

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.