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Finding the Fourth Proportional to 281,480.70, 388,428.97 and 154,131.70

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Solution

The fourth proportional to 281,480.70, 388,428.97 and 154,131.70 is: 212,693.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,480.70 : 388,428.97 = 154,131.70 : x
  2. Step 2: Convert to fraction form
    281,480.70/388,428.97 = 154,131.70/x
  3. Step 3: Cross multiply
    281,480.70x = 388,428.97 × 154,131.70
  4. Step 4: Simplify right side
    281,480.70x = 59,869,217,475.35
  5. Step 5: Solve for x
    x = 59,869,217,475.35/281,480.70
  6. Step 6: Final answer
    x = 212,693.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.