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Finding the Fourth Proportional to 941.13, 1,299 and 646.32

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Solution

The fourth proportional to 941.13, 1,299 and 646.32 is: 892.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    941.13 : 1,299 = 646.32 : x
  2. Step 2: Convert to fraction form
    941.13/1,299 = 646.32/x
  3. Step 3: Cross multiply
    941.13x = 1,299 × 646.32
  4. Step 4: Simplify right side
    941.13x = 839,569.68
  5. Step 5: Solve for x
    x = 839,569.68/941.13
  6. Step 6: Final answer
    x = 892.09

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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.