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Finding the Fourth Proportional to 2,980.63, 4,115.27 and 2,664.87

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Solution

The fourth proportional to 2,980.63, 4,115.27 and 2,664.87 is: 3,679.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,980.63 : 4,115.27 = 2,664.87 : x
  2. Step 2: Convert to fraction form
    2,980.63/4,115.27 = 2,664.87/x
  3. Step 3: Cross multiply
    2,980.63x = 4,115.27 × 2,664.87
  4. Step 4: Simplify right side
    2,980.63x = 10,966,646.24
  5. Step 5: Solve for x
    x = 10,966,646.24/2,980.63
  6. Step 6: Final answer
    x = 3,679.30

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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.