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Finding the Fourth Proportional to 1,698.12, 2,340.90 and 1,199.22

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Solution

The fourth proportional to 1,698.12, 2,340.90 and 1,199.22 is: 1,653.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,698.12 : 2,340.90 = 1,199.22 : x
  2. Step 2: Convert to fraction form
    1,698.12/2,340.90 = 1,199.22/x
  3. Step 3: Cross multiply
    1,698.12x = 2,340.90 × 1,199.22
  4. Step 4: Simplify right side
    1,698.12x = 2,807,254.10
  5. Step 5: Solve for x
    x = 2,807,254.10/1,698.12
  6. Step 6: Final answer
    x = 1,653.15

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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.