Home / 520,298,358.72-718,024,917.92-285,358,372.80

Finding the Fourth Proportional to 520,298,358.72, 718,024,917.92 and 285,358,372.80

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Solution

The fourth proportional to 520,298,358.72, 718,024,917.92 and 285,358,372.80 is: 393,801,784.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,298,358.72 : 718,024,917.92 = 285,358,372.80 : x
  2. Step 2: Convert to fraction form
    520,298,358.72/718,024,917.92 = 285,358,372.80/x
  3. Step 3: Cross multiply
    520,298,358.72x = 718,024,917.92 × 285,358,372.80
  4. Step 4: Simplify right side
    520,298,358.72x = 204,894,422,207,504,768
  5. Step 5: Solve for x
    x = 204,894,422,207,504,768/520,298,358.72
  6. Step 6: Final answer
    x = 393,801,784.64

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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.