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Finding the Fourth Proportional to 1,435.05, 1,982.66 and 995.22

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Solution

The fourth proportional to 1,435.05, 1,982.66 and 995.22 is: 1,374.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,435.05 : 1,982.66 = 995.22 : x
  2. Step 2: Convert to fraction form
    1,435.05/1,982.66 = 995.22/x
  3. Step 3: Cross multiply
    1,435.05x = 1,982.66 × 995.22
  4. Step 4: Simplify right side
    1,435.05x = 1,973,177.91
  5. Step 5: Solve for x
    x = 1,973,177.91/1,435.05
  6. Step 6: Final answer
    x = 1,374.99

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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.