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Finding the Fourth Proportional to 390,091.01, 538,335.72 and 228,952.85

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Solution

The fourth proportional to 390,091.01, 538,335.72 and 228,952.85 is: 315,960.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,091.01 : 538,335.72 = 228,952.85 : x
  2. Step 2: Convert to fraction form
    390,091.01/538,335.72 = 228,952.85/x
  3. Step 3: Cross multiply
    390,091.01x = 538,335.72 × 228,952.85
  4. Step 4: Simplify right side
    390,091.01x = 123,253,494,659.12
  5. Step 5: Solve for x
    x = 123,253,494,659.12/390,091.01
  6. Step 6: Final answer
    x = 315,960.87

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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.