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Finding the Fourth Proportional to 281,653.92, 388,683.96 and 154,334.10

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Solution

The fourth proportional to 281,653.92, 388,683.96 and 154,334.10 is: 212,981.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,653.92 : 388,683.96 = 154,334.10 : x
  2. Step 2: Convert to fraction form
    281,653.92/388,683.96 = 154,334.10/x
  3. Step 3: Cross multiply
    281,653.92x = 388,683.96 × 154,334.10
  4. Step 4: Simplify right side
    281,653.92x = 59,987,189,151.04
  5. Step 5: Solve for x
    x = 59,987,189,151.04/281,653.92
  6. Step 6: Final answer
    x = 212,981.91

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1.5x scale

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.