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Finding the Fourth Proportional to 486.71, 670.01 and 439.94

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Solution

The fourth proportional to 486.71, 670.01 and 439.94 is: 605.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.71 : 670.01 = 439.94 : x
  2. Step 2: Convert to fraction form
    486.71/670.01 = 439.94/x
  3. Step 3: Cross multiply
    486.71x = 670.01 × 439.94
  4. Step 4: Simplify right side
    486.71x = 294,760.85
  5. Step 5: Solve for x
    x = 294,760.85/486.71
  6. Step 6: Final answer
    x = 605.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.