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Finding the Fourth Proportional to 911.41, 1,258.34 and 701.20

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Solution

The fourth proportional to 911.41, 1,258.34 and 701.20 is: 968.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    911.41 : 1,258.34 = 701.20 : x
  2. Step 2: Convert to fraction form
    911.41/1,258.34 = 701.20/x
  3. Step 3: Cross multiply
    911.41x = 1,258.34 × 701.20
  4. Step 4: Simplify right side
    911.41x = 882,349.76
  5. Step 5: Solve for x
    x = 882,349.76/911.41
  6. Step 6: Final answer
    x = 968.12

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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.