Home / 312,488,538.39-431,036,545.64-200,787,401.61

Finding the Fourth Proportional to 312,488,538.39, 431,036,545.64 and 200,787,401.61

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Solution

The fourth proportional to 312,488,538.39, 431,036,545.64 and 200,787,401.61 is: 276,959,623.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,488,538.39 : 431,036,545.64 = 200,787,401.61 : x
  2. Step 2: Convert to fraction form
    312,488,538.39/431,036,545.64 = 200,787,401.61/x
  3. Step 3: Cross multiply
    312,488,538.39x = 431,036,545.64 × 200,787,401.61
  4. Step 4: Simplify right side
    312,488,538.39x = 86,546,707,997,001,840
  5. Step 5: Solve for x
    x = 86,546,707,997,001,840/312,488,538.39
  6. Step 6: Final answer
    x = 276,959,623.68

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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.