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Finding the Fourth Proportional to 995.41, 1,373.64 and 553.28

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Solution

The fourth proportional to 995.41, 1,373.64 and 553.28 is: 763.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.41 : 1,373.64 = 553.28 : x
  2. Step 2: Convert to fraction form
    995.41/1,373.64 = 553.28/x
  3. Step 3: Cross multiply
    995.41x = 1,373.64 × 553.28
  4. Step 4: Simplify right side
    995.41x = 760,007.54
  5. Step 5: Solve for x
    x = 760,007.54/995.41
  6. Step 6: Final answer
    x = 763.52

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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.