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Finding the Fourth Proportional to 435.89, 653.42 and 411.72

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Solution

The fourth proportional to 435.89, 653.42 and 411.72 is: 617.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.89 : 653.42 = 411.72 : x
  2. Step 2: Convert to fraction form
    435.89/653.42 = 411.72/x
  3. Step 3: Cross multiply
    435.89x = 653.42 × 411.72
  4. Step 4: Simplify right side
    435.89x = 269,027.11
  5. Step 5: Solve for x
    x = 269,027.11/435.89
  6. Step 6: Final answer
    x = 617.20

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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.