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Finding the Fourth Proportional to 664.90, 917.55 and 370.16

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Solution

The fourth proportional to 664.90, 917.55 and 370.16 is: 510.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.90 : 917.55 = 370.16 : x
  2. Step 2: Convert to fraction form
    664.90/917.55 = 370.16/x
  3. Step 3: Cross multiply
    664.90x = 917.55 × 370.16
  4. Step 4: Simplify right side
    664.90x = 339,640.70
  5. Step 5: Solve for x
    x = 339,640.70/664.90
  6. Step 6: Final answer
    x = 510.81

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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.