Home / 538,137,540.81-742,629,777.89-290,618,871.21

Finding the Fourth Proportional to 538,137,540.81, 742,629,777.89 and 290,618,871.21

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Solution

The fourth proportional to 538,137,540.81, 742,629,777.89 and 290,618,871.21 is: 401,054,026.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,137,540.81 : 742,629,777.89 = 290,618,871.21 : x
  2. Step 2: Convert to fraction form
    538,137,540.81/742,629,777.89 = 290,618,871.21/x
  3. Step 3: Cross multiply
    538,137,540.81x = 742,629,777.89 × 290,618,871.21
  4. Step 4: Simplify right side
    538,137,540.81x = 215,822,227,775,104,928
  5. Step 5: Solve for x
    x = 215,822,227,775,104,928/538,137,540.81
  6. Step 6: Final answer
    x = 401,054,026.92

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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.