Home / 639,914.40-958,705.20-520,941.60

Finding the Fourth Proportional to 639,914.40, 958,705.20 and 520,941.60

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Solution

The fourth proportional to 639,914.40, 958,705.20 and 520,941.60 is: 780,462.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,914.40 : 958,705.20 = 520,941.60 : x
  2. Step 2: Convert to fraction form
    639,914.40/958,705.20 = 520,941.60/x
  3. Step 3: Cross multiply
    639,914.40x = 958,705.20 × 520,941.60
  4. Step 4: Simplify right side
    639,914.40x = 499,429,420,816.32
  5. Step 5: Solve for x
    x = 499,429,420,816.32/639,914.40
  6. Step 6: Final answer
    x = 780,462.86

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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.