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Finding the Fourth Proportional to 607.99, 911.12 and 470.39

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Solution

The fourth proportional to 607.99, 911.12 and 470.39 is: 704.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.99 : 911.12 = 470.39 : x
  2. Step 2: Convert to fraction form
    607.99/911.12 = 470.39/x
  3. Step 3: Cross multiply
    607.99x = 911.12 × 470.39
  4. Step 4: Simplify right side
    607.99x = 428,583.92
  5. Step 5: Solve for x
    x = 428,583.92/607.99
  6. Step 6: Final answer
    x = 704.92

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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.