Home / 389,920.29-538,090.04-211,072.29

Finding the Fourth Proportional to 389,920.29, 538,090.04 and 211,072.29

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Solution

The fourth proportional to 389,920.29, 538,090.04 and 211,072.29 is: 291,279.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,920.29 : 538,090.04 = 211,072.29 : x
  2. Step 2: Convert to fraction form
    389,920.29/538,090.04 = 211,072.29/x
  3. Step 3: Cross multiply
    389,920.29x = 538,090.04 × 211,072.29
  4. Step 4: Simplify right side
    389,920.29x = 113,575,896,968.99
  5. Step 5: Solve for x
    x = 113,575,896,968.99/389,920.29
  6. Step 6: Final answer
    x = 291,279.78

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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.