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Finding the Fourth Proportional to 281,187.84, 388,045.50 and 153,863.40

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Solution

The fourth proportional to 281,187.84, 388,045.50 and 153,863.40 is: 212,334.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,187.84 : 388,045.50 = 153,863.40 : x
  2. Step 2: Convert to fraction form
    281,187.84/388,045.50 = 153,863.40/x
  3. Step 3: Cross multiply
    281,187.84x = 388,045.50 × 153,863.40
  4. Step 4: Simplify right side
    281,187.84x = 59,705,999,984.70
  5. Step 5: Solve for x
    x = 59,705,999,984.70/281,187.84
  6. Step 6: Final answer
    x = 212,334.93

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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.