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Finding the Fourth Proportional to 1,698.62, 2,551.50 and 1,643.24

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Solution

The fourth proportional to 1,698.62, 2,551.50 and 1,643.24 is: 2,468.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,698.62 : 2,551.50 = 1,643.24 : x
  2. Step 2: Convert to fraction form
    1,698.62/2,551.50 = 1,643.24/x
  3. Step 3: Cross multiply
    1,698.62x = 2,551.50 × 1,643.24
  4. Step 4: Simplify right side
    1,698.62x = 4,192,726.86
  5. Step 5: Solve for x
    x = 4,192,726.86/1,698.62
  6. Step 6: Final answer
    x = 2,468.31

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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.