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Finding the Fourth Proportional to 2,036.90, 2,810.90 and 1,105.40

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Solution

The fourth proportional to 2,036.90, 2,810.90 and 1,105.40 is: 1,525.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,036.90 : 2,810.90 = 1,105.40 : x
  2. Step 2: Convert to fraction form
    2,036.90/2,810.90 = 1,105.40/x
  3. Step 3: Cross multiply
    2,036.90x = 2,810.90 × 1,105.40
  4. Step 4: Simplify right side
    2,036.90x = 3,107,168.86
  5. Step 5: Solve for x
    x = 3,107,168.86/2,036.90
  6. Step 6: Final answer
    x = 1,525.44

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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.