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Finding the Fourth Proportional to 2,287.54, 3,157.03 and 1,391.21

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Solution

The fourth proportional to 2,287.54, 3,157.03 and 1,391.21 is: 1,920.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,287.54 : 3,157.03 = 1,391.21 : x
  2. Step 2: Convert to fraction form
    2,287.54/3,157.03 = 1,391.21/x
  3. Step 3: Cross multiply
    2,287.54x = 3,157.03 × 1,391.21
  4. Step 4: Simplify right side
    2,287.54x = 4,392,094.99
  5. Step 5: Solve for x
    x = 4,392,094.99/2,287.54
  6. Step 6: Final answer
    x = 1,920.01

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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.