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Finding the Fourth Proportional to 470.20, 704.70 and 418.60

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Solution

The fourth proportional to 470.20, 704.70 and 418.60 is: 627.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.20 : 704.70 = 418.60 : x
  2. Step 2: Convert to fraction form
    470.20/704.70 = 418.60/x
  3. Step 3: Cross multiply
    470.20x = 704.70 × 418.60
  4. Step 4: Simplify right side
    470.20x = 294,987.42
  5. Step 5: Solve for x
    x = 294,987.42/470.20
  6. Step 6: Final answer
    x = 627.37

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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.