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Finding the Fourth Proportional to 629.91, 864.62 and 558.41

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Solution

The fourth proportional to 629.91, 864.62 and 558.41 is: 766.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.91 : 864.62 = 558.41 : x
  2. Step 2: Convert to fraction form
    629.91/864.62 = 558.41/x
  3. Step 3: Cross multiply
    629.91x = 864.62 × 558.41
  4. Step 4: Simplify right side
    629.91x = 482,805.34
  5. Step 5: Solve for x
    x = 482,805.34/629.91
  6. Step 6: Final answer
    x = 766.47

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.