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Finding the Fourth Proportional to 911.66, 1,258.69 and 701.45

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Solution

The fourth proportional to 911.66, 1,258.69 and 701.45 is: 968.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    911.66 : 1,258.69 = 701.45 : x
  2. Step 2: Convert to fraction form
    911.66/1,258.69 = 701.45/x
  3. Step 3: Cross multiply
    911.66x = 1,258.69 × 701.45
  4. Step 4: Simplify right side
    911.66x = 882,906.35
  5. Step 5: Solve for x
    x = 882,906.35/911.66
  6. Step 6: Final answer
    x = 968.46

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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.