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Finding the Fourth Proportional to 1,945.43, 2,918.73 and 629.39

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Solution

The fourth proportional to 1,945.43, 2,918.73 and 629.39 is: 944.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,945.43 : 2,918.73 = 629.39 : x
  2. Step 2: Convert to fraction form
    1,945.43/2,918.73 = 629.39/x
  3. Step 3: Cross multiply
    1,945.43x = 2,918.73 × 629.39
  4. Step 4: Simplify right side
    1,945.43x = 1,837,026.77
  5. Step 5: Solve for x
    x = 1,837,026.77/1,945.43
  6. Step 6: Final answer
    x = 944.28

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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.