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Finding the Fourth Proportional to 941.09, 1,296.81 and 688.23

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Solution

The fourth proportional to 941.09, 1,296.81 and 688.23 is: 948.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    941.09 : 1,296.81 = 688.23 : x
  2. Step 2: Convert to fraction form
    941.09/1,296.81 = 688.23/x
  3. Step 3: Cross multiply
    941.09x = 1,296.81 × 688.23
  4. Step 4: Simplify right side
    941.09x = 892,503.55
  5. Step 5: Solve for x
    x = 892,503.55/941.09
  6. Step 6: Final answer
    x = 948.38

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.