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Finding the Fourth Proportional to 1,331.83, 1,841.25 and 999.68

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Solution

The fourth proportional to 1,331.83, 1,841.25 and 999.68 is: 1,382.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331.83 : 1,841.25 = 999.68 : x
  2. Step 2: Convert to fraction form
    1,331.83/1,841.25 = 999.68/x
  3. Step 3: Cross multiply
    1,331.83x = 1,841.25 × 999.68
  4. Step 4: Simplify right side
    1,331.83x = 1,840,658.30
  5. Step 5: Solve for x
    x = 1,840,658.30/1,331.83
  6. Step 6: Final answer
    x = 1,382.05

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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.