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Finding the Fourth Proportional to 470,422.40, 705,633.60 and 425,321.60

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Solution

The fourth proportional to 470,422.40, 705,633.60 and 425,321.60 is: 637,982.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    470,422.40 : 705,633.60 = 425,321.60 : x
  2. Step 2: Convert to fraction form
    470,422.40/705,633.60 = 425,321.60/x
  3. Step 3: Cross multiply
    470,422.40x = 705,633.60 × 425,321.60
  4. Step 4: Simplify right side
    470,422.40x = 300,121,211,765.76
  5. Step 5: Solve for x
    x = 300,121,211,765.76/470,422.40
  6. Step 6: Final answer
    x = 637,982.40

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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.