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Finding the Fourth Proportional to 470,090.40, 705,135.60 and 418,914.60

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Solution

The fourth proportional to 470,090.40, 705,135.60 and 418,914.60 is: 628,371.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    470,090.40 : 705,135.60 = 418,914.60 : x
  2. Step 2: Convert to fraction form
    470,090.40/705,135.60 = 418,914.60/x
  3. Step 3: Cross multiply
    470,090.40x = 705,135.60 × 418,914.60
  4. Step 4: Simplify right side
    470,090.40x = 295,391,597,819.76
  5. Step 5: Solve for x
    x = 295,391,597,819.76/470,090.40
  6. Step 6: Final answer
    x = 628,371.90

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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.