Home / 1,508,422-2,081,661.78-820,140.16

Finding the Fourth Proportional to 1,508,422, 2,081,661.78 and 820,140.16

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Solution

The fourth proportional to 1,508,422, 2,081,661.78 and 820,140.16 is: 1,131,814.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,508,422 : 2,081,661.78 = 820,140.16 : x
  2. Step 2: Convert to fraction form
    1,508,422/2,081,661.78 = 820,140.16/x
  3. Step 3: Cross multiply
    1,508,422x = 2,081,661.78 × 820,140.16
  4. Step 4: Simplify right side
    1,508,422x = 1,707,254,425,315.09
  5. Step 5: Solve for x
    x = 1,707,254,425,315.09/1,508,422
  6. Step 6: Final answer
    x = 1,131,814.85

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.