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Finding the Fourth Proportional to 3,485.57, 4,810.11 and 1,892.22

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Solution

The fourth proportional to 3,485.57, 4,810.11 and 1,892.22 is: 2,611.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,485.57 : 4,810.11 = 1,892.22 : x
  2. Step 2: Convert to fraction form
    3,485.57/4,810.11 = 1,892.22/x
  3. Step 3: Cross multiply
    3,485.57x = 4,810.11 × 1,892.22
  4. Step 4: Simplify right side
    3,485.57x = 9,101,786.34
  5. Step 5: Solve for x
    x = 9,101,786.34/3,485.57
  6. Step 6: Final answer
    x = 2,611.28

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Half scale
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Double scale
Find fourth proportional to 3,486.57, 4,811.49 and 1,893.22
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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.