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Finding the Fourth Proportional to 2,107.40, 3,158.40 and 1,009.40

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Solution

The fourth proportional to 2,107.40, 3,158.40 and 1,009.40 is: 1,512.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,107.40 : 3,158.40 = 1,009.40 : x
  2. Step 2: Convert to fraction form
    2,107.40/3,158.40 = 1,009.40/x
  3. Step 3: Cross multiply
    2,107.40x = 3,158.40 × 1,009.40
  4. Step 4: Simplify right side
    2,107.40x = 3,188,088.96
  5. Step 5: Solve for x
    x = 3,188,088.96/2,107.40
  6. Step 6: Final answer
    x = 1,512.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.