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Finding the Fourth Proportional to 281,163.60, 387,999.72 and 153,838.80

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Solution

The fourth proportional to 281,163.60, 387,999.72 and 153,838.80 is: 212,294.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,163.60 : 387,999.72 = 153,838.80 : x
  2. Step 2: Convert to fraction form
    281,163.60/387,999.72 = 153,838.80/x
  3. Step 3: Cross multiply
    281,163.60x = 387,999.72 × 153,838.80
  4. Step 4: Simplify right side
    281,163.60x = 59,689,411,325.14
  5. Step 5: Solve for x
    x = 59,689,411,325.14/281,163.60
  6. Step 6: Final answer
    x = 212,294.23

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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.