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Finding the Fourth Proportional to 995.56, 1,373.86 and 553.43

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Solution

The fourth proportional to 995.56, 1,373.86 and 553.43 is: 763.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.56 : 1,373.86 = 553.43 : x
  2. Step 2: Convert to fraction form
    995.56/1,373.86 = 553.43/x
  3. Step 3: Cross multiply
    995.56x = 1,373.86 × 553.43
  4. Step 4: Simplify right side
    995.56x = 760,335.34
  5. Step 5: Solve for x
    x = 760,335.34/995.56
  6. Step 6: Final answer
    x = 763.73

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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.