Home / 1,945.14-2,917.77-646.56

Finding the Fourth Proportional to 1,945.14, 2,917.77 and 646.56

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Solution

The fourth proportional to 1,945.14, 2,917.77 and 646.56 is: 969.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,945.14 : 2,917.77 = 646.56 : x
  2. Step 2: Convert to fraction form
    1,945.14/2,917.77 = 646.56/x
  3. Step 3: Cross multiply
    1,945.14x = 2,917.77 × 646.56
  4. Step 4: Simplify right side
    1,945.14x = 1,886,513.37
  5. Step 5: Solve for x
    x = 1,886,513.37/1,945.14
  6. Step 6: Final answer
    x = 969.86

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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.