Home / 919,119.80-1,379,802.90-520,038.20

Finding the Fourth Proportional to 919,119.80, 1,379,802.90 and 520,038.20

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Solution

The fourth proportional to 919,119.80, 1,379,802.90 and 520,038.20 is: 780,692.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,119.80 : 1,379,802.90 = 520,038.20 : x
  2. Step 2: Convert to fraction form
    919,119.80/1,379,802.90 = 520,038.20/x
  3. Step 3: Cross multiply
    919,119.80x = 1,379,802.90 × 520,038.20
  4. Step 4: Simplify right side
    919,119.80x = 717,550,216,470.78
  5. Step 5: Solve for x
    x = 717,550,216,470.78/919,119.80
  6. Step 6: Final answer
    x = 780,692.81

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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.