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Finding the Fourth Proportional to 378,453.60, 522,271.44 and 208,687.68

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Solution

The fourth proportional to 378,453.60, 522,271.44 and 208,687.68 is: 287,992.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,453.60 : 522,271.44 = 208,687.68 : x
  2. Step 2: Convert to fraction form
    378,453.60/522,271.44 = 208,687.68/x
  3. Step 3: Cross multiply
    378,453.60x = 522,271.44 × 208,687.68
  4. Step 4: Simplify right side
    378,453.60x = 108,991,615,143.86
  5. Step 5: Solve for x
    x = 108,991,615,143.86/378,453.60
  6. Step 6: Final answer
    x = 287,992.02

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1.5x scale

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.