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Finding the Fourth Proportional to 435.96, 653.22 and 421.02

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Solution

The fourth proportional to 435.96, 653.22 and 421.02 is: 630.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.96 : 653.22 = 421.02 : x
  2. Step 2: Convert to fraction form
    435.96/653.22 = 421.02/x
  3. Step 3: Cross multiply
    435.96x = 653.22 × 421.02
  4. Step 4: Simplify right side
    435.96x = 275,018.68
  5. Step 5: Solve for x
    x = 275,018.68/435.96
  6. Step 6: Final answer
    x = 630.83

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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.