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Finding the Fourth Proportional to 681.06, 939.42 and 670.26

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Solution

The fourth proportional to 681.06, 939.42 and 670.26 is: 924.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.06 : 939.42 = 670.26 : x
  2. Step 2: Convert to fraction form
    681.06/939.42 = 670.26/x
  3. Step 3: Cross multiply
    681.06x = 939.42 × 670.26
  4. Step 4: Simplify right side
    681.06x = 629,655.65
  5. Step 5: Solve for x
    x = 629,655.65/681.06
  6. Step 6: Final answer
    x = 924.52

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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.