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Finding the Fourth Proportional to 1,383,486, 1,909,210.68 and 779,874

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Solution

The fourth proportional to 1,383,486, 1,909,210.68 and 779,874 is: 1,076,226.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,383,486 : 1,909,210.68 = 779,874 : x
  2. Step 2: Convert to fraction form
    1,383,486/1,909,210.68 = 779,874/x
  3. Step 3: Cross multiply
    1,383,486x = 1,909,210.68 × 779,874
  4. Step 4: Simplify right side
    1,383,486x = 1,488,943,769,854.32
  5. Step 5: Solve for x
    x = 1,488,943,769,854.32/1,383,486
  6. Step 6: Final answer
    x = 1,076,226.12

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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.