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Finding the Fourth Proportional to 995.19, 1,372.32 and 696.70

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Solution

The fourth proportional to 995.19, 1,372.32 and 696.70 is: 960.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.19 : 1,372.32 = 696.70 : x
  2. Step 2: Convert to fraction form
    995.19/1,372.32 = 696.70/x
  3. Step 3: Cross multiply
    995.19x = 1,372.32 × 696.70
  4. Step 4: Simplify right side
    995.19x = 956,095.34
  5. Step 5: Solve for x
    x = 956,095.34/995.19
  6. Step 6: Final answer
    x = 960.72

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Double scale
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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.