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Finding the Fourth Proportional to 1,751.60, 2,629.80 and 1,386.80

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Solution

The fourth proportional to 1,751.60, 2,629.80 and 1,386.80 is: 2,082.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,751.60 : 2,629.80 = 1,386.80 : x
  2. Step 2: Convert to fraction form
    1,751.60/2,629.80 = 1,386.80/x
  3. Step 3: Cross multiply
    1,751.60x = 2,629.80 × 1,386.80
  4. Step 4: Simplify right side
    1,751.60x = 3,647,006.64
  5. Step 5: Solve for x
    x = 3,647,006.64/1,751.60
  6. Step 6: Final answer
    x = 2,082.10

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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.