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Finding the Fourth Proportional to 1,806.78, 2,495.10 and 1,409.55

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Solution

The fourth proportional to 1,806.78, 2,495.10 and 1,409.55 is: 1,946.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,806.78 : 2,495.10 = 1,409.55 : x
  2. Step 2: Convert to fraction form
    1,806.78/2,495.10 = 1,409.55/x
  3. Step 3: Cross multiply
    1,806.78x = 2,495.10 × 1,409.55
  4. Step 4: Simplify right side
    1,806.78x = 3,516,968.21
  5. Step 5: Solve for x
    x = 3,516,968.21/1,806.78
  6. Step 6: Final answer
    x = 1,946.54

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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.