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Finding the Fourth Proportional to 1,905.92, 2,860.09 and 810.28

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Solution

The fourth proportional to 1,905.92, 2,860.09 and 810.28 is: 1,215.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,905.92 : 2,860.09 = 810.28 : x
  2. Step 2: Convert to fraction form
    1,905.92/2,860.09 = 810.28/x
  3. Step 3: Cross multiply
    1,905.92x = 2,860.09 × 810.28
  4. Step 4: Simplify right side
    1,905.92x = 2,317,479.13
  5. Step 5: Solve for x
    x = 2,317,479.13/1,905.92
  6. Step 6: Final answer
    x = 1,215.94

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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.