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Finding the Fourth Proportional to 1,906.55, 2,858.90 and 810.32

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Solution

The fourth proportional to 1,906.55, 2,858.90 and 810.32 is: 1,215.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,906.55 : 2,858.90 = 810.32 : x
  2. Step 2: Convert to fraction form
    1,906.55/2,858.90 = 810.32/x
  3. Step 3: Cross multiply
    1,906.55x = 2,858.90 × 810.32
  4. Step 4: Simplify right side
    1,906.55x = 2,316,611.58
  5. Step 5: Solve for x
    x = 2,316,611.58/1,906.55
  6. Step 6: Final answer
    x = 1,215.08

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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.