Home / 2,490.82-3,438.64-1,698.32

Finding the Fourth Proportional to 2,490.82, 3,438.64 and 1,698.32

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Solution

The fourth proportional to 2,490.82, 3,438.64 and 1,698.32 is: 2,344.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,490.82 : 3,438.64 = 1,698.32 : x
  2. Step 2: Convert to fraction form
    2,490.82/3,438.64 = 1,698.32/x
  3. Step 3: Cross multiply
    2,490.82x = 3,438.64 × 1,698.32
  4. Step 4: Simplify right side
    2,490.82x = 5,839,911.08
  5. Step 5: Solve for x
    x = 5,839,911.08/2,490.82
  6. Step 6: Final answer
    x = 2,344.57

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1.5x scale

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.