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Finding the Fourth Proportional to 2,940.64, 4,381.05 and 2,801.32

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Solution

The fourth proportional to 2,940.64, 4,381.05 and 2,801.32 is: 4,173.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,940.64 : 4,381.05 = 2,801.32 : x
  2. Step 2: Convert to fraction form
    2,940.64/4,381.05 = 2,801.32/x
  3. Step 3: Cross multiply
    2,940.64x = 4,381.05 × 2,801.32
  4. Step 4: Simplify right side
    2,940.64x = 12,272,722.99
  5. Step 5: Solve for x
    x = 12,272,722.99/2,940.64
  6. Step 6: Final answer
    x = 4,173.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.