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Finding the Fourth Proportional to 992.23, 1,485.51 and 667.02

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Solution

The fourth proportional to 992.23, 1,485.51 and 667.02 is: 998.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    992.23 : 1,485.51 = 667.02 : x
  2. Step 2: Convert to fraction form
    992.23/1,485.51 = 667.02/x
  3. Step 3: Cross multiply
    992.23x = 1,485.51 × 667.02
  4. Step 4: Simplify right side
    992.23x = 990,864.88
  5. Step 5: Solve for x
    x = 990,864.88/992.23
  6. Step 6: Final answer
    x = 998.62

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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.