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Finding the Fourth Proportional to 435.94, 653.90 and 161.87

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Solution

The fourth proportional to 435.94, 653.90 and 161.87 is: 242.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.94 : 653.90 = 161.87 : x
  2. Step 2: Convert to fraction form
    435.94/653.90 = 161.87/x
  3. Step 3: Cross multiply
    435.94x = 653.90 × 161.87
  4. Step 4: Simplify right side
    435.94x = 105,842.71
  5. Step 5: Solve for x
    x = 105,842.71/435.94
  6. Step 6: Final answer
    x = 242.79

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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.