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Finding the Fourth Proportional to 1,041.84, 1,438.20 and 995.40

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Solution

The fourth proportional to 1,041.84, 1,438.20 and 995.40 is: 1,374.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,041.84 : 1,438.20 = 995.40 : x
  2. Step 2: Convert to fraction form
    1,041.84/1,438.20 = 995.40/x
  3. Step 3: Cross multiply
    1,041.84x = 1,438.20 × 995.40
  4. Step 4: Simplify right side
    1,041.84x = 1,431,584.28
  5. Step 5: Solve for x
    x = 1,431,584.28/1,041.84
  6. Step 6: Final answer
    x = 1,374.09

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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.