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Finding the Fourth Proportional to 1,806.78, 2,494.20 and 1,478.70

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Solution

The fourth proportional to 1,806.78, 2,494.20 and 1,478.70 is: 2,041.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,806.78 : 2,494.20 = 1,478.70 : x
  2. Step 2: Convert to fraction form
    1,806.78/2,494.20 = 1,478.70/x
  3. Step 3: Cross multiply
    1,806.78x = 2,494.20 × 1,478.70
  4. Step 4: Simplify right side
    1,806.78x = 3,688,173.54
  5. Step 5: Solve for x
    x = 3,688,173.54/1,806.78
  6. Step 6: Final answer
    x = 2,041.30

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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.