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Finding the Fourth Proportional to 490,685.52, 677,027.78 and 286,620.60

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Solution

The fourth proportional to 490,685.52, 677,027.78 and 286,620.60 is: 395,467.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,685.52 : 677,027.78 = 286,620.60 : x
  2. Step 2: Convert to fraction form
    490,685.52/677,027.78 = 286,620.60/x
  3. Step 3: Cross multiply
    490,685.52x = 677,027.78 × 286,620.60
  4. Step 4: Simplify right side
    490,685.52x = 194,050,108,520.27
  5. Step 5: Solve for x
    x = 194,050,108,520.27/490,685.52
  6. Step 6: Final answer
    x = 395,467.36

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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.