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Finding the Fourth Proportional to 856.06, 1,285.00 and 683.80

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Solution

The fourth proportional to 856.06, 1,285.00 and 683.80 is: 1,026.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    856.06 : 1,285.00 = 683.80 : x
  2. Step 2: Convert to fraction form
    856.06/1,285.00 = 683.80/x
  3. Step 3: Cross multiply
    856.06x = 1,285.00 × 683.80
  4. Step 4: Simplify right side
    856.06x = 878,678.08
  5. Step 5: Solve for x
    x = 878,678.08/856.06
  6. Step 6: Final answer
    x = 1,026.42

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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.