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Finding the Fourth Proportional to 285.81, 426.22 and 270.45

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Solution

The fourth proportional to 285.81, 426.22 and 270.45 is: 403.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.81 : 426.22 = 270.45 : x
  2. Step 2: Convert to fraction form
    285.81/426.22 = 270.45/x
  3. Step 3: Cross multiply
    285.81x = 426.22 × 270.45
  4. Step 4: Simplify right side
    285.81x = 115,271.20
  5. Step 5: Solve for x
    x = 115,271.20/285.81
  6. Step 6: Final answer
    x = 403.31

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.