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Finding the Fourth Proportional to 995.84, 1,489.28 and 670.72

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Solution

The fourth proportional to 995.84, 1,489.28 and 670.72 is: 1,003.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.84 : 1,489.28 = 670.72 : x
  2. Step 2: Convert to fraction form
    995.84/1,489.28 = 670.72/x
  3. Step 3: Cross multiply
    995.84x = 1,489.28 × 670.72
  4. Step 4: Simplify right side
    995.84x = 998,889.88
  5. Step 5: Solve for x
    x = 998,889.88/995.84
  6. Step 6: Final answer
    x = 1,003.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.