Home / 1,690.58-2,538.57-1,274.15

Finding the Fourth Proportional to 1,690.58, 2,538.57 and 1,274.15

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Solution

The fourth proportional to 1,690.58, 2,538.57 and 1,274.15 is: 1,913.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,690.58 : 2,538.57 = 1,274.15 : x
  2. Step 2: Convert to fraction form
    1,690.58/2,538.57 = 1,274.15/x
  3. Step 3: Cross multiply
    1,690.58x = 2,538.57 × 1,274.15
  4. Step 4: Simplify right side
    1,690.58x = 3,234,518.97
  5. Step 5: Solve for x
    x = 3,234,518.97/1,690.58
  6. Step 6: Final answer
    x = 1,913.26

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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.