Home / 420,047.40-629,998.20-153,670.80

Finding the Fourth Proportional to 420,047.40, 629,998.20 and 153,670.80

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Solution

The fourth proportional to 420,047.40, 629,998.20 and 153,670.80 is: 230,479.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,047.40 : 629,998.20 = 153,670.80 : x
  2. Step 2: Convert to fraction form
    420,047.40/629,998.20 = 153,670.80/x
  3. Step 3: Cross multiply
    420,047.40x = 629,998.20 × 153,670.80
  4. Step 4: Simplify right side
    420,047.40x = 96,812,327,392.56
  5. Step 5: Solve for x
    x = 96,812,327,392.56/420,047.40
  6. Step 6: Final answer
    x = 230,479.53

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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.