Home / 1,945.40-2,918.46-629.50

Finding the Fourth Proportional to 1,945.40, 2,918.46 and 629.50

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Solution

The fourth proportional to 1,945.40, 2,918.46 and 629.50 is: 944.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,945.40 : 2,918.46 = 629.50 : x
  2. Step 2: Convert to fraction form
    1,945.40/2,918.46 = 629.50/x
  3. Step 3: Cross multiply
    1,945.40x = 2,918.46 × 629.50
  4. Step 4: Simplify right side
    1,945.40x = 1,837,170.57
  5. Step 5: Solve for x
    x = 1,837,170.57/1,945.40
  6. Step 6: Final answer
    x = 944.37

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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.