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Finding the Fourth Proportional to 393.55, 586.46 and 380.49

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Solution

The fourth proportional to 393.55, 586.46 and 380.49 is: 567.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.55 : 586.46 = 380.49 : x
  2. Step 2: Convert to fraction form
    393.55/586.46 = 380.49/x
  3. Step 3: Cross multiply
    393.55x = 586.46 × 380.49
  4. Step 4: Simplify right side
    393.55x = 223,142.17
  5. Step 5: Solve for x
    x = 223,142.17/393.55
  6. Step 6: Final answer
    x = 567.00

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.