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Finding the Fourth Proportional to 390,027, 538,237.26 and 211,179

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Solution

The fourth proportional to 390,027, 538,237.26 and 211,179 is: 291,427.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,027 : 538,237.26 = 211,179 : x
  2. Step 2: Convert to fraction form
    390,027/538,237.26 = 211,179/x
  3. Step 3: Cross multiply
    390,027x = 538,237.26 × 211,179
  4. Step 4: Simplify right side
    390,027x = 113,664,406,329.54
  5. Step 5: Solve for x
    x = 113,664,406,329.54/390,027
  6. Step 6: Final answer
    x = 291,427.02

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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.