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Finding the Fourth Proportional to 941.72, 1,296.54 and 808.68

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Solution

The fourth proportional to 941.72, 1,296.54 and 808.68 is: 1,113.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    941.72 : 1,296.54 = 808.68 : x
  2. Step 2: Convert to fraction form
    941.72/1,296.54 = 808.68/x
  3. Step 3: Cross multiply
    941.72x = 1,296.54 × 808.68
  4. Step 4: Simplify right side
    941.72x = 1,048,485.97
  5. Step 5: Solve for x
    x = 1,048,485.97/941.72
  6. Step 6: Final answer
    x = 1,113.37

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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.