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Finding the Fourth Proportional to 664.60, 917.14 and 369.87

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Solution

The fourth proportional to 664.60, 917.14 and 369.87 is: 510.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.60 : 917.14 = 369.87 : x
  2. Step 2: Convert to fraction form
    664.60/917.14 = 369.87/x
  3. Step 3: Cross multiply
    664.60x = 917.14 × 369.87
  4. Step 4: Simplify right side
    664.60x = 339,222.57
  5. Step 5: Solve for x
    x = 339,222.57/664.60
  6. Step 6: Final answer
    x = 510.42

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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.