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Finding the Fourth Proportional to 995.47, 1,373.68 and 553.37

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Solution

The fourth proportional to 995.47, 1,373.68 and 553.37 is: 763.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.47 : 1,373.68 = 553.37 : x
  2. Step 2: Convert to fraction form
    995.47/1,373.68 = 553.37/x
  3. Step 3: Cross multiply
    995.47x = 1,373.68 × 553.37
  4. Step 4: Simplify right side
    995.47x = 760,153.30
  5. Step 5: Solve for x
    x = 760,153.30/995.47
  6. Step 6: Final answer
    x = 763.61

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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.