Home / 919,153.80-1,379,853.90-520,072.20

Finding the Fourth Proportional to 919,153.80, 1,379,853.90 and 520,072.20

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Solution

The fourth proportional to 919,153.80, 1,379,853.90 and 520,072.20 is: 780,743.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,153.80 : 1,379,853.90 = 520,072.20 : x
  2. Step 2: Convert to fraction form
    919,153.80/1,379,853.90 = 520,072.20/x
  3. Step 3: Cross multiply
    919,153.80x = 1,379,853.90 × 520,072.20
  4. Step 4: Simplify right side
    919,153.80x = 717,623,653,451.58
  5. Step 5: Solve for x
    x = 717,623,653,451.58/919,153.80
  6. Step 6: Final answer
    x = 780,743.82

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Double scale
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Similar ratio
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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.