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Finding the Fourth Proportional to 681.04, 940.68 and 670.80

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Solution

The fourth proportional to 681.04, 940.68 and 670.80 is: 926.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.04 : 940.68 = 670.80 : x
  2. Step 2: Convert to fraction form
    681.04/940.68 = 670.80/x
  3. Step 3: Cross multiply
    681.04x = 940.68 × 670.80
  4. Step 4: Simplify right side
    681.04x = 631,008.14
  5. Step 5: Solve for x
    x = 631,008.14/681.04
  6. Step 6: Final answer
    x = 926.54

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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.