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Finding the Fourth Proportional to 1,381,080.16, 1,905,986.41 and 837,238.87

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Solution

The fourth proportional to 1,381,080.16, 1,905,986.41 and 837,238.87 is: 1,155,447.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,381,080.16 : 1,905,986.41 = 837,238.87 : x
  2. Step 2: Convert to fraction form
    1,381,080.16/1,905,986.41 = 837,238.87/x
  3. Step 3: Cross multiply
    1,381,080.16x = 1,905,986.41 × 837,238.87
  4. Step 4: Simplify right side
    1,381,080.16x = 1,595,765,901,285.69
  5. Step 5: Solve for x
    x = 1,595,765,901,285.69/1,381,080.16
  6. Step 6: Final answer
    x = 1,155,447.71

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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.