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Finding the Fourth Proportional to 2,889.96, 3,990.48 and 2,328.60

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Solution

The fourth proportional to 2,889.96, 3,990.48 and 2,328.60 is: 3,215.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,889.96 : 3,990.48 = 2,328.60 : x
  2. Step 2: Convert to fraction form
    2,889.96/3,990.48 = 2,328.60/x
  3. Step 3: Cross multiply
    2,889.96x = 3,990.48 × 2,328.60
  4. Step 4: Simplify right side
    2,889.96x = 9,292,231.73
  5. Step 5: Solve for x
    x = 9,292,231.73/2,889.96
  6. Step 6: Final answer
    x = 3,215.35

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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.