Home / 1,690.26-2,333.76-1,271.58

Finding the Fourth Proportional to 1,690.26, 2,333.76 and 1,271.58

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Solution

The fourth proportional to 1,690.26, 2,333.76 and 1,271.58 is: 1,755.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,690.26 : 2,333.76 = 1,271.58 : x
  2. Step 2: Convert to fraction form
    1,690.26/2,333.76 = 1,271.58/x
  3. Step 3: Cross multiply
    1,690.26x = 2,333.76 × 1,271.58
  4. Step 4: Simplify right side
    1,690.26x = 2,967,562.54
  5. Step 5: Solve for x
    x = 2,967,562.54/1,690.26
  6. Step 6: Final answer
    x = 1,755.68

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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.