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Finding the Fourth Proportional to 414,391.80, 621,431.46 and 133,833.72

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Solution

The fourth proportional to 414,391.80, 621,431.46 and 133,833.72 is: 200,700.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    414,391.80 : 621,431.46 = 133,833.72 : x
  2. Step 2: Convert to fraction form
    414,391.80/621,431.46 = 133,833.72/x
  3. Step 3: Cross multiply
    414,391.80x = 621,431.46 × 133,833.72
  4. Step 4: Simplify right side
    414,391.80x = 83,168,484,016.83
  5. Step 5: Solve for x
    x = 83,168,484,016.83/414,391.80
  6. Step 6: Final answer
    x = 200,700.12

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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.