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Finding the Fourth Proportional to 1,383,480, 1,909,202.40 and 779,868

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Solution

The fourth proportional to 1,383,480, 1,909,202.40 and 779,868 is: 1,076,217.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,383,480 : 1,909,202.40 = 779,868 : x
  2. Step 2: Convert to fraction form
    1,383,480/1,909,202.40 = 779,868/x
  3. Step 3: Cross multiply
    1,383,480x = 1,909,202.40 × 779,868
  4. Step 4: Simplify right side
    1,383,480x = 1,488,925,857,283.20
  5. Step 5: Solve for x
    x = 1,488,925,857,283.20/1,383,480
  6. Step 6: Final answer
    x = 1,076,217.84

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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.