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Finding the Fourth Proportional to 476.28, 713.21 and 389.00

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Solution

The fourth proportional to 476.28, 713.21 and 389.00 is: 582.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.28 : 713.21 = 389.00 : x
  2. Step 2: Convert to fraction form
    476.28/713.21 = 389.00/x
  3. Step 3: Cross multiply
    476.28x = 713.21 × 389.00
  4. Step 4: Simplify right side
    476.28x = 277,438.53
  5. Step 5: Solve for x
    x = 277,438.53/476.28
  6. Step 6: Final answer
    x = 582.51

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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.