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Finding the Fourth Proportional to 664.81, 917.45 and 370.07

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Solution

The fourth proportional to 664.81, 917.45 and 370.07 is: 510.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.81 : 917.45 = 370.07 : x
  2. Step 2: Convert to fraction form
    664.81/917.45 = 370.07/x
  3. Step 3: Cross multiply
    664.81x = 917.45 × 370.07
  4. Step 4: Simplify right side
    664.81x = 339,523.94
  5. Step 5: Solve for x
    x = 339,523.94/664.81
  6. Step 6: Final answer
    x = 510.71

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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.