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Finding the Fourth Proportional to 1,999.66, 3,000.07 and 829.45

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Solution

The fourth proportional to 1,999.66, 3,000.07 and 829.45 is: 1,244.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,999.66 : 3,000.07 = 829.45 : x
  2. Step 2: Convert to fraction form
    1,999.66/3,000.07 = 829.45/x
  3. Step 3: Cross multiply
    1,999.66x = 3,000.07 × 829.45
  4. Step 4: Simplify right side
    1,999.66x = 2,488,408.06
  5. Step 5: Solve for x
    x = 2,488,408.06/1,999.66
  6. Step 6: Final answer
    x = 1,244.42

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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.