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Finding the Fourth Proportional to 470,221.20, 705,331.80 and 137,797.20

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Solution

The fourth proportional to 470,221.20, 705,331.80 and 137,797.20 is: 206,695.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    470,221.20 : 705,331.80 = 137,797.20 : x
  2. Step 2: Convert to fraction form
    470,221.20/705,331.80 = 137,797.20/x
  3. Step 3: Cross multiply
    470,221.20x = 705,331.80 × 137,797.20
  4. Step 4: Simplify right side
    470,221.20x = 97,192,747,110.96
  5. Step 5: Solve for x
    x = 97,192,747,110.96/470,221.20
  6. Step 6: Final answer
    x = 206,695.80

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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.