Home / 1,383,992.16-1,909,909.44-780,380.16

Finding the Fourth Proportional to 1,383,992.16, 1,909,909.44 and 780,380.16

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Solution

The fourth proportional to 1,383,992.16, 1,909,909.44 and 780,380.16 is: 1,076,924.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,383,992.16 : 1,909,909.44 = 780,380.16 : x
  2. Step 2: Convert to fraction form
    1,383,992.16/1,909,909.44 = 780,380.16/x
  3. Step 3: Cross multiply
    1,383,992.16x = 1,909,909.44 × 780,380.16
  4. Step 4: Simplify right side
    1,383,992.16x = 1,490,455,434,372.71
  5. Step 5: Solve for x
    x = 1,490,455,434,372.71/1,383,992.16
  6. Step 6: Final answer
    x = 1,076,924.77

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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.