Home / 378,183.20-521,917.48-217,090.40

Finding the Fourth Proportional to 378,183.20, 521,917.48 and 217,090.40

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Solution

The fourth proportional to 378,183.20, 521,917.48 and 217,090.40 is: 299,598.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,183.20 : 521,917.48 = 217,090.40 : x
  2. Step 2: Convert to fraction form
    378,183.20/521,917.48 = 217,090.40/x
  3. Step 3: Cross multiply
    378,183.20x = 521,917.48 × 217,090.40
  4. Step 4: Simplify right side
    378,183.20x = 113,303,274,500.19
  5. Step 5: Solve for x
    x = 113,303,274,500.19/378,183.20
  6. Step 6: Final answer
    x = 299,598.91

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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.