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Finding the Fourth Proportional to 995.90, 1,364.58 and 981.32

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Solution

The fourth proportional to 995.90, 1,364.58 and 981.32 is: 1,344.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.90 : 1,364.58 = 981.32 : x
  2. Step 2: Convert to fraction form
    995.90/1,364.58 = 981.32/x
  3. Step 3: Cross multiply
    995.90x = 1,364.58 × 981.32
  4. Step 4: Simplify right side
    995.90x = 1,339,082.82
  5. Step 5: Solve for x
    x = 1,339,082.82/995.90
  6. Step 6: Final answer
    x = 1,344.60

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.