Home / 520,858,012.25-718,785,077.51-309,207,289.38

Finding the Fourth Proportional to 520,858,012.25, 718,785,077.51 and 309,207,289.38

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Solution

The fourth proportional to 520,858,012.25, 718,785,077.51 and 309,207,289.38 is: 426,706,665.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,858,012.25 : 718,785,077.51 = 309,207,289.38 : x
  2. Step 2: Convert to fraction form
    520,858,012.25/718,785,077.51 = 309,207,289.38/x
  3. Step 3: Cross multiply
    520,858,012.25x = 718,785,077.51 × 309,207,289.38
  4. Step 4: Simplify right side
    520,858,012.25x = 222,253,585,462,114,272
  5. Step 5: Solve for x
    x = 222,253,585,462,114,272/520,858,012.25
  6. Step 6: Final answer
    x = 426,706,665.23

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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.