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Finding the Fourth Proportional to 664.77, 917.39 and 370.03

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Solution

The fourth proportional to 664.77, 917.39 and 370.03 is: 510.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.77 : 917.39 = 370.03 : x
  2. Step 2: Convert to fraction form
    664.77/917.39 = 370.03/x
  3. Step 3: Cross multiply
    664.77x = 917.39 × 370.03
  4. Step 4: Simplify right side
    664.77x = 339,455.38
  5. Step 5: Solve for x
    x = 339,455.38/664.77
  6. Step 6: Final answer
    x = 510.64

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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.