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Finding the Fourth Proportional to 3,887,661.78, 5,364,308.84 and 2,255,695.02

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Solution

The fourth proportional to 3,887,661.78, 5,364,308.84 and 2,255,695.02 is: 3,112,473.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,887,661.78 : 5,364,308.84 = 2,255,695.02 : x
  2. Step 2: Convert to fraction form
    3,887,661.78/5,364,308.84 = 2,255,695.02/x
  3. Step 3: Cross multiply
    3,887,661.78x = 5,364,308.84 × 2,255,695.02
  4. Step 4: Simplify right side
    3,887,661.78x = 12,100,244,724,851.50
  5. Step 5: Solve for x
    x = 12,100,244,724,851.50/3,887,661.78
  6. Step 6: Final answer
    x = 3,112,473.62

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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.