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Finding the Fourth Proportional to 995.18, 1,373.51 and 553.22

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Solution

The fourth proportional to 995.18, 1,373.51 and 553.22 is: 763.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.18 : 1,373.51 = 553.22 : x
  2. Step 2: Convert to fraction form
    995.18/1,373.51 = 553.22/x
  3. Step 3: Cross multiply
    995.18x = 1,373.51 × 553.22
  4. Step 4: Simplify right side
    995.18x = 759,850.44
  5. Step 5: Solve for x
    x = 759,850.44/995.18
  6. Step 6: Final answer
    x = 763.53

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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.