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Finding the Fourth Proportional to 470.41, 705.61 and 279.25

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Solution

The fourth proportional to 470.41, 705.61 and 279.25 is: 418.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.41 : 705.61 = 279.25 : x
  2. Step 2: Convert to fraction form
    470.41/705.61 = 279.25/x
  3. Step 3: Cross multiply
    470.41x = 705.61 × 279.25
  4. Step 4: Simplify right side
    470.41x = 197,040.18
  5. Step 5: Solve for x
    x = 197,040.18/470.41
  6. Step 6: Final answer
    x = 418.87

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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.