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Finding the Fourth Proportional to 664.98, 918.06 and 416.66

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Solution

The fourth proportional to 664.98, 918.06 and 416.66 is: 575.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.98 : 918.06 = 416.66 : x
  2. Step 2: Convert to fraction form
    664.98/918.06 = 416.66/x
  3. Step 3: Cross multiply
    664.98x = 918.06 × 416.66
  4. Step 4: Simplify right side
    664.98x = 382,518.88
  5. Step 5: Solve for x
    x = 382,518.88/664.98
  6. Step 6: Final answer
    x = 575.23

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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.