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Finding the Fourth Proportional to 664.23, 916.47 and 443.04

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Solution

The fourth proportional to 664.23, 916.47 and 443.04 is: 611.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.23 : 916.47 = 443.04 : x
  2. Step 2: Convert to fraction form
    664.23/916.47 = 443.04/x
  3. Step 3: Cross multiply
    664.23x = 916.47 × 443.04
  4. Step 4: Simplify right side
    664.23x = 406,032.87
  5. Step 5: Solve for x
    x = 406,032.87/664.23
  6. Step 6: Final answer
    x = 611.28

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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.