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Finding the Fourth Proportional to 435.35, 653.22 and 161.39

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Solution

The fourth proportional to 435.35, 653.22 and 161.39 is: 242.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.35 : 653.22 = 161.39 : x
  2. Step 2: Convert to fraction form
    435.35/653.22 = 161.39/x
  3. Step 3: Cross multiply
    435.35x = 653.22 × 161.39
  4. Step 4: Simplify right side
    435.35x = 105,424.81
  5. Step 5: Solve for x
    x = 105,424.81/435.35
  6. Step 6: Final answer
    x = 242.16

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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.