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Finding the Fourth Proportional to 210,978.36, 291,285.98 and 188,278.38

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Solution

The fourth proportional to 210,978.36, 291,285.98 and 188,278.38 is: 259,945.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,978.36 : 291,285.98 = 188,278.38 : x
  2. Step 2: Convert to fraction form
    210,978.36/291,285.98 = 188,278.38/x
  3. Step 3: Cross multiply
    210,978.36x = 291,285.98 × 188,278.38
  4. Step 4: Simplify right side
    210,978.36x = 54,842,852,431.11
  5. Step 5: Solve for x
    x = 54,842,852,431.11/210,978.36
  6. Step 6: Final answer
    x = 259,945.39

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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.