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Finding the Fourth Proportional to 995.30, 1,373.86 and 622.06

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Solution

The fourth proportional to 995.30, 1,373.86 and 622.06 is: 858.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.30 : 1,373.86 = 622.06 : x
  2. Step 2: Convert to fraction form
    995.30/1,373.86 = 622.06/x
  3. Step 3: Cross multiply
    995.30x = 1,373.86 × 622.06
  4. Step 4: Simplify right side
    995.30x = 854,623.35
  5. Step 5: Solve for x
    x = 854,623.35/995.30
  6. Step 6: Final answer
    x = 858.66

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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.