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Finding the Fourth Proportional to 276,820, 415,406.61 and 99,323.08

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Solution

The fourth proportional to 276,820, 415,406.61 and 99,323.08 is: 149,047.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,820 : 415,406.61 = 99,323.08 : x
  2. Step 2: Convert to fraction form
    276,820/415,406.61 = 99,323.08/x
  3. Step 3: Cross multiply
    276,820x = 415,406.61 × 99,323.08
  4. Step 4: Simplify right side
    276,820x = 41,259,463,957.56
  5. Step 5: Solve for x
    x = 41,259,463,957.56/276,820
  6. Step 6: Final answer
    x = 149,047.99

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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.