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Finding the Fourth Proportional to 921.26, 1,271.96 and 701.34

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Solution

The fourth proportional to 921.26, 1,271.96 and 701.34 is: 968.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    921.26 : 1,271.96 = 701.34 : x
  2. Step 2: Convert to fraction form
    921.26/1,271.96 = 701.34/x
  3. Step 3: Cross multiply
    921.26x = 1,271.96 × 701.34
  4. Step 4: Simplify right side
    921.26x = 892,072.92
  5. Step 5: Solve for x
    x = 892,072.92/921.26
  6. Step 6: Final answer
    x = 968.32

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Double scale
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1.5x scale

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.