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Finding the Fourth Proportional to 1,084.55, 1,626.41 and 856.13

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Solution

The fourth proportional to 1,084.55, 1,626.41 and 856.13 is: 1,283.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,084.55 : 1,626.41 = 856.13 : x
  2. Step 2: Convert to fraction form
    1,084.55/1,626.41 = 856.13/x
  3. Step 3: Cross multiply
    1,084.55x = 1,626.41 × 856.13
  4. Step 4: Simplify right side
    1,084.55x = 1,392,418.39
  5. Step 5: Solve for x
    x = 1,392,418.39/1,084.55
  6. Step 6: Final answer
    x = 1,283.87

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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.