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Finding the Fourth Proportional to 470,725.10, 706,087.65 and 155,105.90

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Solution

The fourth proportional to 470,725.10, 706,087.65 and 155,105.90 is: 232,658.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    470,725.10 : 706,087.65 = 155,105.90 : x
  2. Step 2: Convert to fraction form
    470,725.10/706,087.65 = 155,105.90/x
  3. Step 3: Cross multiply
    470,725.10x = 706,087.65 × 155,105.90
  4. Step 4: Simplify right side
    470,725.10x = 109,518,360,432.14
  5. Step 5: Solve for x
    x = 109,518,360,432.14/470,725.10
  6. Step 6: Final answer
    x = 232,658.85

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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.