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Finding the Fourth Proportional to 1,199.98, 1,655.93 and 668.84

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Solution

The fourth proportional to 1,199.98, 1,655.93 and 668.84 is: 922.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,199.98 : 1,655.93 = 668.84 : x
  2. Step 2: Convert to fraction form
    1,199.98/1,655.93 = 668.84/x
  3. Step 3: Cross multiply
    1,199.98x = 1,655.93 × 668.84
  4. Step 4: Simplify right side
    1,199.98x = 1,107,541.85
  5. Step 5: Solve for x
    x = 1,107,541.85/1,199.98
  6. Step 6: Final answer
    x = 922.97

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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.