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Finding the Fourth Proportional to 3,458.70, 5,186.51 and 992.96

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Solution

The fourth proportional to 3,458.70, 5,186.51 and 992.96 is: 1,489.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,458.70 : 5,186.51 = 992.96 : x
  2. Step 2: Convert to fraction form
    3,458.70/5,186.51 = 992.96/x
  3. Step 3: Cross multiply
    3,458.70x = 5,186.51 × 992.96
  4. Step 4: Simplify right side
    3,458.70x = 5,149,996.97
  5. Step 5: Solve for x
    x = 5,149,996.97/3,458.70
  6. Step 6: Final answer
    x = 1,489.00

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1.5x scale

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.