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Finding the Fourth Proportional to 435.79, 653.43 and 215.97

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Solution

The fourth proportional to 435.79, 653.43 and 215.97 is: 323.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.79 : 653.43 = 215.97 : x
  2. Step 2: Convert to fraction form
    435.79/653.43 = 215.97/x
  3. Step 3: Cross multiply
    435.79x = 653.43 × 215.97
  4. Step 4: Simplify right side
    435.79x = 141,119.41
  5. Step 5: Solve for x
    x = 141,119.41/435.79
  6. Step 6: Final answer
    x = 323.83

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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.