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Finding the Fourth Proportional to 1,379.37, 1,903.95 and 881.85

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Solution

The fourth proportional to 1,379.37, 1,903.95 and 881.85 is: 1,217.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,379.37 : 1,903.95 = 881.85 : x
  2. Step 2: Convert to fraction form
    1,379.37/1,903.95 = 881.85/x
  3. Step 3: Cross multiply
    1,379.37x = 1,903.95 × 881.85
  4. Step 4: Simplify right side
    1,379.37x = 1,678,998.31
  5. Step 5: Solve for x
    x = 1,678,998.31/1,379.37
  6. Step 6: Final answer
    x = 1,217.22

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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.