Home / 678,234.80-1,017,352.20-412,516.40

Finding the Fourth Proportional to 678,234.80, 1,017,352.20 and 412,516.40

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Solution

The fourth proportional to 678,234.80, 1,017,352.20 and 412,516.40 is: 618,774.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,234.80 : 1,017,352.20 = 412,516.40 : x
  2. Step 2: Convert to fraction form
    678,234.80/1,017,352.20 = 412,516.40/x
  3. Step 3: Cross multiply
    678,234.80x = 1,017,352.20 × 412,516.40
  4. Step 4: Simplify right side
    678,234.80x = 419,674,467,076.08
  5. Step 5: Solve for x
    x = 419,674,467,076.08/678,234.80
  6. Step 6: Final answer
    x = 618,774.60

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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.