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Finding the Fourth Proportional to 279,896.82, 386,243 and 159,021.32

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Solution

The fourth proportional to 279,896.82, 386,243 and 159,021.32 is: 219,441.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,896.82 : 386,243 = 159,021.32 : x
  2. Step 2: Convert to fraction form
    279,896.82/386,243 = 159,021.32/x
  3. Step 3: Cross multiply
    279,896.82x = 386,243 × 159,021.32
  4. Step 4: Simplify right side
    279,896.82x = 61,420,871,700.76
  5. Step 5: Solve for x
    x = 61,420,871,700.76/279,896.82
  6. Step 6: Final answer
    x = 219,441.12

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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.