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Finding the Fourth Proportional to 995.69, 1,374.69 and 681.48

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Solution

The fourth proportional to 995.69, 1,374.69 and 681.48 is: 940.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.69 : 1,374.69 = 681.48 : x
  2. Step 2: Convert to fraction form
    995.69/1,374.69 = 681.48/x
  3. Step 3: Cross multiply
    995.69x = 1,374.69 × 681.48
  4. Step 4: Simplify right side
    995.69x = 936,823.74
  5. Step 5: Solve for x
    x = 936,823.74/995.69
  6. Step 6: Final answer
    x = 940.88

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1.5x scale

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.