Home / 1,191,128.28-1,643,755.77-647,262.78

Finding the Fourth Proportional to 1,191,128.28, 1,643,755.77 and 647,262.78

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Solution

The fourth proportional to 1,191,128.28, 1,643,755.77 and 647,262.78 is: 893,221.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,191,128.28 : 1,643,755.77 = 647,262.78 : x
  2. Step 2: Convert to fraction form
    1,191,128.28/1,643,755.77 = 647,262.78/x
  3. Step 3: Cross multiply
    1,191,128.28x = 1,643,755.77 × 647,262.78
  4. Step 4: Simplify right side
    1,191,128.28x = 1,063,941,929,331.24
  5. Step 5: Solve for x
    x = 1,063,941,929,331.24/1,191,128.28
  6. Step 6: Final answer
    x = 893,221.95

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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.