Home / 685,276.70-1,027,979.85-186,640.70

Finding the Fourth Proportional to 685,276.70, 1,027,979.85 and 186,640.70

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Solution

The fourth proportional to 685,276.70, 1,027,979.85 and 186,640.70 is: 279,978.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,276.70 : 1,027,979.85 = 186,640.70 : x
  2. Step 2: Convert to fraction form
    685,276.70/1,027,979.85 = 186,640.70/x
  3. Step 3: Cross multiply
    685,276.70x = 1,027,979.85 × 186,640.70
  4. Step 4: Simplify right side
    685,276.70x = 191,862,878,789.90
  5. Step 5: Solve for x
    x = 191,862,878,789.90/685,276.70
  6. Step 6: Final answer
    x = 279,978.70

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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.