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Finding the Fourth Proportional to 1,945.72, 2,918.99 and 629.54

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Solution

The fourth proportional to 1,945.72, 2,918.99 and 629.54 is: 944.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,945.72 : 2,918.99 = 629.54 : x
  2. Step 2: Convert to fraction form
    1,945.72/2,918.99 = 629.54/x
  3. Step 3: Cross multiply
    1,945.72x = 2,918.99 × 629.54
  4. Step 4: Simplify right side
    1,945.72x = 1,837,629.84
  5. Step 5: Solve for x
    x = 1,837,629.84/1,945.72
  6. Step 6: Final answer
    x = 944.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.