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Finding the Fourth Proportional to 281,838.92, 388,937.68 and 154,515.40

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Solution

The fourth proportional to 281,838.92, 388,937.68 and 154,515.40 is: 213,231.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,838.92 : 388,937.68 = 154,515.40 : x
  2. Step 2: Convert to fraction form
    281,838.92/388,937.68 = 154,515.40/x
  3. Step 3: Cross multiply
    281,838.92x = 388,937.68 × 154,515.40
  4. Step 4: Simplify right side
    281,838.92x = 60,096,861,200.27
  5. Step 5: Solve for x
    x = 60,096,861,200.27/281,838.92
  6. Step 6: Final answer
    x = 213,231.24

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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.