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Finding the Fourth Proportional to 664.00, 916.57 and 442.87

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Solution

The fourth proportional to 664.00, 916.57 and 442.87 is: 611.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.00 : 916.57 = 442.87 : x
  2. Step 2: Convert to fraction form
    664.00/916.57 = 442.87/x
  3. Step 3: Cross multiply
    664.00x = 916.57 × 442.87
  4. Step 4: Simplify right side
    664.00x = 405,914.56
  5. Step 5: Solve for x
    x = 405,914.56/664.00
  6. Step 6: Final answer
    x = 611.32

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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.