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Finding the Fourth Proportional to 404.81, 607.22 and 392.97

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Solution

The fourth proportional to 404.81, 607.22 and 392.97 is: 589.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.81 : 607.22 = 392.97 : x
  2. Step 2: Convert to fraction form
    404.81/607.22 = 392.97/x
  3. Step 3: Cross multiply
    404.81x = 607.22 × 392.97
  4. Step 4: Simplify right side
    404.81x = 238,619.24
  5. Step 5: Solve for x
    x = 238,619.24/404.81
  6. Step 6: Final answer
    x = 589.46

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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.