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Finding the Fourth Proportional to 995.54, 1,373.91 and 684.50

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Solution

The fourth proportional to 995.54, 1,373.91 and 684.50 is: 944.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.54 : 1,373.91 = 684.50 : x
  2. Step 2: Convert to fraction form
    995.54/1,373.91 = 684.50/x
  3. Step 3: Cross multiply
    995.54x = 1,373.91 × 684.50
  4. Step 4: Simplify right side
    995.54x = 940,441.40
  5. Step 5: Solve for x
    x = 940,441.40/995.54
  6. Step 6: Final answer
    x = 944.65

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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.