Home / 919,128.30-1,379,815.65-520,046.70

Finding the Fourth Proportional to 919,128.30, 1,379,815.65 and 520,046.70

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Solution

The fourth proportional to 919,128.30, 1,379,815.65 and 520,046.70 is: 780,705.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,128.30 : 1,379,815.65 = 520,046.70 : x
  2. Step 2: Convert to fraction form
    919,128.30/1,379,815.65 = 520,046.70/x
  3. Step 3: Cross multiply
    919,128.30x = 1,379,815.65 × 520,046.70
  4. Step 4: Simplify right side
    919,128.30x = 717,568,575,390.86
  5. Step 5: Solve for x
    x = 717,568,575,390.86/919,128.30
  6. Step 6: Final answer
    x = 780,705.56

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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.