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Finding the Fourth Proportional to 1,405,406.34, 1,939,461.39 and 760,826.54

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Solution

The fourth proportional to 1,405,406.34, 1,939,461.39 and 760,826.54 is: 1,049,940.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,405,406.34 : 1,939,461.39 = 760,826.54 : x
  2. Step 2: Convert to fraction form
    1,405,406.34/1,939,461.39 = 760,826.54/x
  3. Step 3: Cross multiply
    1,405,406.34x = 1,939,461.39 × 760,826.54
  4. Step 4: Simplify right side
    1,405,406.34x = 1,475,593,689,119.98
  5. Step 5: Solve for x
    x = 1,475,593,689,119.98/1,405,406.34
  6. Step 6: Final answer
    x = 1,049,940.97

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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.