Home / 812,838.65-1,220,014.58-413,778.11

Finding the Fourth Proportional to 812,838.65, 1,220,014.58 and 413,778.11

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Solution

The fourth proportional to 812,838.65, 1,220,014.58 and 413,778.11 is: 621,052.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,838.65 : 1,220,014.58 = 413,778.11 : x
  2. Step 2: Convert to fraction form
    812,838.65/1,220,014.58 = 413,778.11/x
  3. Step 3: Cross multiply
    812,838.65x = 1,220,014.58 × 413,778.11
  4. Step 4: Simplify right side
    812,838.65x = 504,815,318,915.88
  5. Step 5: Solve for x
    x = 504,815,318,915.88/812,838.65
  6. Step 6: Final answer
    x = 621,052.31

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1.5x scale

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.