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Finding the Fourth Proportional to 435.72, 653.90 and 161.99

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Solution

The fourth proportional to 435.72, 653.90 and 161.99 is: 243.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.72 : 653.90 = 161.99 : x
  2. Step 2: Convert to fraction form
    435.72/653.90 = 161.99/x
  3. Step 3: Cross multiply
    435.72x = 653.90 × 161.99
  4. Step 4: Simplify right side
    435.72x = 105,925.26
  5. Step 5: Solve for x
    x = 105,925.26/435.72
  6. Step 6: Final answer
    x = 243.10

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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.