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Finding the Fourth Proportional to 1,698.56, 2,343.84 and 999.68

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Solution

The fourth proportional to 1,698.56, 2,343.84 and 999.68 is: 1,379.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,698.56 : 2,343.84 = 999.68 : x
  2. Step 2: Convert to fraction form
    1,698.56/2,343.84 = 999.68/x
  3. Step 3: Cross multiply
    1,698.56x = 2,343.84 × 999.68
  4. Step 4: Simplify right side
    1,698.56x = 2,343,089.97
  5. Step 5: Solve for x
    x = 2,343,089.97/1,698.56
  6. Step 6: Final answer
    x = 1,379.46

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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.