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Finding the Fourth Proportional to 470.46, 705.90 and 254.19

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Solution

The fourth proportional to 470.46, 705.90 and 254.19 is: 381.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.46 : 705.90 = 254.19 : x
  2. Step 2: Convert to fraction form
    470.46/705.90 = 254.19/x
  3. Step 3: Cross multiply
    470.46x = 705.90 × 254.19
  4. Step 4: Simplify right side
    470.46x = 179,432.72
  5. Step 5: Solve for x
    x = 179,432.72/470.46
  6. Step 6: Final answer
    x = 381.40

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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.