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Finding the Fourth Proportional to 1,124,731.20, 1,687,096.80 and 1,124,731.20

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Solution

The fourth proportional to 1,124,731.20, 1,687,096.80 and 1,124,731.20 is: 1,687,096.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,124,731.20 : 1,687,096.80 = 1,124,731.20 : x
  2. Step 2: Convert to fraction form
    1,124,731.20/1,687,096.80 = 1,124,731.20/x
  3. Step 3: Cross multiply
    1,124,731.20x = 1,687,096.80 × 1,124,731.20
  4. Step 4: Simplify right side
    1,124,731.20x = 1,897,530,408,380.16
  5. Step 5: Solve for x
    x = 1,897,530,408,380.16/1,124,731.20
  6. Step 6: Final answer
    x = 1,687,096.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.