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Finding the Fourth Proportional to 281,293.32, 388,185.21 and 153,976.98

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Solution

The fourth proportional to 281,293.32, 388,185.21 and 153,976.98 is: 212,488.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,293.32 : 388,185.21 = 153,976.98 : x
  2. Step 2: Convert to fraction form
    281,293.32/388,185.21 = 153,976.98/x
  3. Step 3: Cross multiply
    281,293.32x = 388,185.21 × 153,976.98
  4. Step 4: Simplify right side
    281,293.32x = 59,771,586,316.47
  5. Step 5: Solve for x
    x = 59,771,586,316.47/281,293.32
  6. Step 6: Final answer
    x = 212,488.47

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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.