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Finding the Fourth Proportional to 470.86, 706.89 and 394.30

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Solution

The fourth proportional to 470.86, 706.89 and 394.30 is: 591.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.86 : 706.89 = 394.30 : x
  2. Step 2: Convert to fraction form
    470.86/706.89 = 394.30/x
  3. Step 3: Cross multiply
    470.86x = 706.89 × 394.30
  4. Step 4: Simplify right side
    470.86x = 278,726.73
  5. Step 5: Solve for x
    x = 278,726.73/470.86
  6. Step 6: Final answer
    x = 591.95

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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.