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Finding the Fourth Proportional to 1,519.78, 2,097.33 and 856.66

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Solution

The fourth proportional to 1,519.78, 2,097.33 and 856.66 is: 1,182.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,519.78 : 2,097.33 = 856.66 : x
  2. Step 2: Convert to fraction form
    1,519.78/2,097.33 = 856.66/x
  3. Step 3: Cross multiply
    1,519.78x = 2,097.33 × 856.66
  4. Step 4: Simplify right side
    1,519.78x = 1,796,698.72
  5. Step 5: Solve for x
    x = 1,796,698.72/1,519.78
  6. Step 6: Final answer
    x = 1,182.21

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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.