Home / 389,862.90-538,042.06-309,949.92

Finding the Fourth Proportional to 389,862.90, 538,042.06 and 309,949.92

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Solution

The fourth proportional to 389,862.90, 538,042.06 and 309,949.92 is: 427,755.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,862.90 : 538,042.06 = 309,949.92 : x
  2. Step 2: Convert to fraction form
    389,862.90/538,042.06 = 309,949.92/x
  3. Step 3: Cross multiply
    389,862.90x = 538,042.06 × 309,949.92
  4. Step 4: Simplify right side
    389,862.90x = 166,766,090,558.78
  5. Step 5: Solve for x
    x = 166,766,090,558.78/389,862.90
  6. Step 6: Final answer
    x = 427,755.74

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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.