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Finding the Fourth Proportional to 941.97, 1,298.55 and 661.32

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Solution

The fourth proportional to 941.97, 1,298.55 and 661.32 is: 911.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    941.97 : 1,298.55 = 661.32 : x
  2. Step 2: Convert to fraction form
    941.97/1,298.55 = 661.32/x
  3. Step 3: Cross multiply
    941.97x = 1,298.55 × 661.32
  4. Step 4: Simplify right side
    941.97x = 858,757.09
  5. Step 5: Solve for x
    x = 858,757.09/941.97
  6. Step 6: Final answer
    x = 911.66

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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.