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Finding the Fourth Proportional to 664.68, 917.22 and 369.91

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Solution

The fourth proportional to 664.68, 917.22 and 369.91 is: 510.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.68 : 917.22 = 369.91 : x
  2. Step 2: Convert to fraction form
    664.68/917.22 = 369.91/x
  3. Step 3: Cross multiply
    664.68x = 917.22 × 369.91
  4. Step 4: Simplify right side
    664.68x = 339,288.85
  5. Step 5: Solve for x
    x = 339,288.85/664.68
  6. Step 6: Final answer
    x = 510.45

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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.