Home / 420,936.40-630,967.20-231,104.80

Finding the Fourth Proportional to 420,936.40, 630,967.20 and 231,104.80

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Solution

The fourth proportional to 420,936.40, 630,967.20 and 231,104.80 is: 346,417.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,936.40 : 630,967.20 = 231,104.80 : x
  2. Step 2: Convert to fraction form
    420,936.40/630,967.20 = 231,104.80/x
  3. Step 3: Cross multiply
    420,936.40x = 630,967.20 × 231,104.80
  4. Step 4: Simplify right side
    420,936.40x = 145,819,548,562.56
  5. Step 5: Solve for x
    x = 145,819,548,562.56/420,936.40
  6. Step 6: Final answer
    x = 346,417.06

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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.