Home / 389,920.02-538,091.31-211,072.02

Finding the Fourth Proportional to 389,920.02, 538,091.31 and 211,072.02

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Solution

The fourth proportional to 389,920.02, 538,091.31 and 211,072.02 is: 291,280.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,920.02 : 538,091.31 = 211,072.02 : x
  2. Step 2: Convert to fraction form
    389,920.02/538,091.31 = 211,072.02/x
  3. Step 3: Cross multiply
    389,920.02x = 538,091.31 × 211,072.02
  4. Step 4: Simplify right side
    389,920.02x = 113,576,019,746.15
  5. Step 5: Solve for x
    x = 113,576,019,746.15/389,920.02
  6. Step 6: Final answer
    x = 291,280.30

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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.