Home / 1,391,798.28-1,920,685.26-811,366.02

Finding the Fourth Proportional to 1,391,798.28, 1,920,685.26 and 811,366.02

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Solution

The fourth proportional to 1,391,798.28, 1,920,685.26 and 811,366.02 is: 1,119,687.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,798.28 : 1,920,685.26 = 811,366.02 : x
  2. Step 2: Convert to fraction form
    1,391,798.28/1,920,685.26 = 811,366.02/x
  3. Step 3: Cross multiply
    1,391,798.28x = 1,920,685.26 × 811,366.02
  4. Step 4: Simplify right side
    1,391,798.28x = 1,558,378,755,078.87
  5. Step 5: Solve for x
    x = 1,558,378,755,078.87/1,391,798.28
  6. Step 6: Final answer
    x = 1,119,687.23

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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.