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Finding the Fourth Proportional to 389,910.02, 538,077.51 and 211,062.02

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Solution

The fourth proportional to 389,910.02, 538,077.51 and 211,062.02 is: 291,266.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,910.02 : 538,077.51 = 211,062.02 : x
  2. Step 2: Convert to fraction form
    389,910.02/538,077.51 = 211,062.02/x
  3. Step 3: Cross multiply
    389,910.02x = 538,077.51 × 211,062.02
  4. Step 4: Simplify right side
    389,910.02x = 113,567,726,177.17
  5. Step 5: Solve for x
    x = 113,567,726,177.17/389,910.02
  6. Step 6: Final answer
    x = 291,266.50

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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.