Home / 919,157.30-1,379,859.15-520,075.70

Finding the Fourth Proportional to 919,157.30, 1,379,859.15 and 520,075.70

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Solution

The fourth proportional to 919,157.30, 1,379,859.15 and 520,075.70 is: 780,749.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,157.30 : 1,379,859.15 = 520,075.70 : x
  2. Step 2: Convert to fraction form
    919,157.30/1,379,859.15 = 520,075.70/x
  3. Step 3: Cross multiply
    919,157.30x = 1,379,859.15 × 520,075.70
  4. Step 4: Simplify right side
    919,157.30x = 717,631,213,337.66
  5. Step 5: Solve for x
    x = 717,631,213,337.66/919,157.30
  6. Step 6: Final answer
    x = 780,749.08

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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.