Home / 1,383,999.16-1,909,919.10-780,387.16

Finding the Fourth Proportional to 1,383,999.16, 1,909,919.10 and 780,387.16

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Solution

The fourth proportional to 1,383,999.16, 1,909,919.10 and 780,387.16 is: 1,076,934.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,383,999.16 : 1,909,919.10 = 780,387.16 : x
  2. Step 2: Convert to fraction form
    1,383,999.16/1,909,919.10 = 780,387.16/x
  3. Step 3: Cross multiply
    1,383,999.16x = 1,909,919.10 × 780,387.16
  4. Step 4: Simplify right side
    1,383,999.16x = 1,490,476,342,278.76
  5. Step 5: Solve for x
    x = 1,490,476,342,278.76/1,383,999.16
  6. Step 6: Final answer
    x = 1,076,934.43

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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.