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Finding the Fourth Proportional to 613.84, 921.04 and 382.64

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Solution

The fourth proportional to 613.84, 921.04 and 382.64 is: 574.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.84 : 921.04 = 382.64 : x
  2. Step 2: Convert to fraction form
    613.84/921.04 = 382.64/x
  3. Step 3: Cross multiply
    613.84x = 921.04 × 382.64
  4. Step 4: Simplify right side
    613.84x = 352,426.75
  5. Step 5: Solve for x
    x = 352,426.75/613.84
  6. Step 6: Final answer
    x = 574.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.