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Finding the Fourth Proportional to 2,379.62, 3,276.40 and 2,160.92

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Solution

The fourth proportional to 2,379.62, 3,276.40 and 2,160.92 is: 2,975.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,379.62 : 3,276.40 = 2,160.92 : x
  2. Step 2: Convert to fraction form
    2,379.62/3,276.40 = 2,160.92/x
  3. Step 3: Cross multiply
    2,379.62x = 3,276.40 × 2,160.92
  4. Step 4: Simplify right side
    2,379.62x = 7,080,038.29
  5. Step 5: Solve for x
    x = 7,080,038.29/2,379.62
  6. Step 6: Final answer
    x = 2,975.28

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1.5x scale

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.