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Finding the Fourth Proportional to 463.28, 693.36 and 390.25

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Solution

The fourth proportional to 463.28, 693.36 and 390.25 is: 584.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.28 : 693.36 = 390.25 : x
  2. Step 2: Convert to fraction form
    463.28/693.36 = 390.25/x
  3. Step 3: Cross multiply
    463.28x = 693.36 × 390.25
  4. Step 4: Simplify right side
    463.28x = 270,583.74
  5. Step 5: Solve for x
    x = 270,583.74/463.28
  6. Step 6: Final answer
    x = 584.06

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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.