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Finding the Fourth Proportional to 664.02, 916.14 and 443.01

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Solution

The fourth proportional to 664.02, 916.14 and 443.01 is: 611.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.02 : 916.14 = 443.01 : x
  2. Step 2: Convert to fraction form
    664.02/916.14 = 443.01/x
  3. Step 3: Cross multiply
    664.02x = 916.14 × 443.01
  4. Step 4: Simplify right side
    664.02x = 405,859.18
  5. Step 5: Solve for x
    x = 405,859.18/664.02
  6. Step 6: Final answer
    x = 611.22

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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.