Home / 420,130.60-628,847.10-220,165.80

Finding the Fourth Proportional to 420,130.60, 628,847.10 and 220,165.80

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Solution

The fourth proportional to 420,130.60, 628,847.10 and 220,165.80 is: 329,541.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,130.60 : 628,847.10 = 220,165.80 : x
  2. Step 2: Convert to fraction form
    420,130.60/628,847.10 = 220,165.80/x
  3. Step 3: Cross multiply
    420,130.60x = 628,847.10 × 220,165.80
  4. Step 4: Simplify right side
    420,130.60x = 138,450,624,849.18
  5. Step 5: Solve for x
    x = 138,450,624,849.18/420,130.60
  6. Step 6: Final answer
    x = 329,541.87

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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.