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Finding the Fourth Proportional to 2,157.48, 2,976.21 and 1,370.70

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Solution

The fourth proportional to 2,157.48, 2,976.21 and 1,370.70 is: 1,890.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,157.48 : 2,976.21 = 1,370.70 : x
  2. Step 2: Convert to fraction form
    2,157.48/2,976.21 = 1,370.70/x
  3. Step 3: Cross multiply
    2,157.48x = 2,976.21 × 1,370.70
  4. Step 4: Simplify right side
    2,157.48x = 4,079,491.05
  5. Step 5: Solve for x
    x = 4,079,491.05/2,157.48
  6. Step 6: Final answer
    x = 1,890.86

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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.