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Finding the Fourth Proportional to 435.51, 653.20 and 142.97

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Solution

The fourth proportional to 435.51, 653.20 and 142.97 is: 214.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.51 : 653.20 = 142.97 : x
  2. Step 2: Convert to fraction form
    435.51/653.20 = 142.97/x
  3. Step 3: Cross multiply
    435.51x = 653.20 × 142.97
  4. Step 4: Simplify right side
    435.51x = 93,384.38
  5. Step 5: Solve for x
    x = 93,384.38/435.51
  6. Step 6: Final answer
    x = 214.43

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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.