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Finding the Fourth Proportional to 5,330.43, 7,990.79 and 1,865.79

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Solution

The fourth proportional to 5,330.43, 7,990.79 and 1,865.79 is: 2,796.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,330.43 : 7,990.79 = 1,865.79 : x
  2. Step 2: Convert to fraction form
    5,330.43/7,990.79 = 1,865.79/x
  3. Step 3: Cross multiply
    5,330.43x = 7,990.79 × 1,865.79
  4. Step 4: Simplify right side
    5,330.43x = 14,909,126.75
  5. Step 5: Solve for x
    x = 14,909,126.75/5,330.43
  6. Step 6: Final answer
    x = 2,796.98

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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.