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Finding the Fourth Proportional to 995.84, 1,374.33 and 553.88

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Solution

The fourth proportional to 995.84, 1,374.33 and 553.88 is: 764.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.84 : 1,374.33 = 553.88 : x
  2. Step 2: Convert to fraction form
    995.84/1,374.33 = 553.88/x
  3. Step 3: Cross multiply
    995.84x = 1,374.33 × 553.88
  4. Step 4: Simplify right side
    995.84x = 761,207.03
  5. Step 5: Solve for x
    x = 761,207.03/995.84
  6. Step 6: Final answer
    x = 764.39

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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.