Home / 1,945.49-2,917.76-646.79

Finding the Fourth Proportional to 1,945.49, 2,917.76 and 646.79

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Solution

The fourth proportional to 1,945.49, 2,917.76 and 646.79 is: 970.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,945.49 : 2,917.76 = 646.79 : x
  2. Step 2: Convert to fraction form
    1,945.49/2,917.76 = 646.79/x
  3. Step 3: Cross multiply
    1,945.49x = 2,917.76 × 646.79
  4. Step 4: Simplify right side
    1,945.49x = 1,887,160.17
  5. Step 5: Solve for x
    x = 1,887,160.17/1,945.49
  6. Step 6: Final answer
    x = 970.02

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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.