Home / 279,961.20-420,816.60-274,712.40

Finding the Fourth Proportional to 279,961.20, 420,816.60 and 274,712.40

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Solution

The fourth proportional to 279,961.20, 420,816.60 and 274,712.40 is: 412,927.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,961.20 : 420,816.60 = 274,712.40 : x
  2. Step 2: Convert to fraction form
    279,961.20/420,816.60 = 274,712.40/x
  3. Step 3: Cross multiply
    279,961.20x = 420,816.60 × 274,712.40
  4. Step 4: Simplify right side
    279,961.20x = 115,603,538,145.84
  5. Step 5: Solve for x
    x = 115,603,538,145.84/279,961.20
  6. Step 6: Final answer
    x = 412,927.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.