Home / 685,112.10-1,027,668.15-638,456.10

Finding the Fourth Proportional to 685,112.10, 1,027,668.15 and 638,456.10

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Solution

The fourth proportional to 685,112.10, 1,027,668.15 and 638,456.10 is: 957,684.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,112.10 : 1,027,668.15 = 638,456.10 : x
  2. Step 2: Convert to fraction form
    685,112.10/1,027,668.15 = 638,456.10/x
  3. Step 3: Cross multiply
    685,112.10x = 1,027,668.15 × 638,456.10
  4. Step 4: Simplify right side
    685,112.10x = 656,120,999,143.22
  5. Step 5: Solve for x
    x = 656,120,999,143.22/685,112.10
  6. Step 6: Final answer
    x = 957,684.15

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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.