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Finding the Fourth Proportional to 276,721.30, 412,789 and 268,563.78

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Solution

The fourth proportional to 276,721.30, 412,789 and 268,563.78 is: 400,620.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,721.30 : 412,789 = 268,563.78 : x
  2. Step 2: Convert to fraction form
    276,721.30/412,789 = 268,563.78/x
  3. Step 3: Cross multiply
    276,721.30x = 412,789 × 268,563.78
  4. Step 4: Simplify right side
    276,721.30x = 110,860,174,182.42
  5. Step 5: Solve for x
    x = 110,860,174,182.42/276,721.30
  6. Step 6: Final answer
    x = 400,620.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.