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Finding the Fourth Proportional to 681.62, 940.23 and 445.25

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Solution

The fourth proportional to 681.62, 940.23 and 445.25 is: 614.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.62 : 940.23 = 445.25 : x
  2. Step 2: Convert to fraction form
    681.62/940.23 = 445.25/x
  3. Step 3: Cross multiply
    681.62x = 940.23 × 445.25
  4. Step 4: Simplify right side
    681.62x = 418,639.76
  5. Step 5: Solve for x
    x = 418,639.76/681.62
  6. Step 6: Final answer
    x = 614.19

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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.