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Finding the Fourth Proportional to 470,974.20, 706,428.90 and 151,121.40

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Solution

The fourth proportional to 470,974.20, 706,428.90 and 151,121.40 is: 226,671.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    470,974.20 : 706,428.90 = 151,121.40 : x
  2. Step 2: Convert to fraction form
    470,974.20/706,428.90 = 151,121.40/x
  3. Step 3: Cross multiply
    470,974.20x = 706,428.90 × 151,121.40
  4. Step 4: Simplify right side
    470,974.20x = 106,756,524,368.46
  5. Step 5: Solve for x
    x = 106,756,524,368.46/470,974.20
  6. Step 6: Final answer
    x = 226,671.70

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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.