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Finding the Fourth Proportional to 681.84, 941.04 and 387.18

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Solution

The fourth proportional to 681.84, 941.04 and 387.18 is: 534.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.84 : 941.04 = 387.18 : x
  2. Step 2: Convert to fraction form
    681.84/941.04 = 387.18/x
  3. Step 3: Cross multiply
    681.84x = 941.04 × 387.18
  4. Step 4: Simplify right side
    681.84x = 364,351.87
  5. Step 5: Solve for x
    x = 364,351.87/681.84
  6. Step 6: Final answer
    x = 534.37

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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.