Home / 1,259,487.20-1,889,230.80-811,589.60

Finding the Fourth Proportional to 1,259,487.20, 1,889,230.80 and 811,589.60

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Solution

The fourth proportional to 1,259,487.20, 1,889,230.80 and 811,589.60 is: 1,217,384.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,259,487.20 : 1,889,230.80 = 811,589.60 : x
  2. Step 2: Convert to fraction form
    1,259,487.20/1,889,230.80 = 811,589.60/x
  3. Step 3: Cross multiply
    1,259,487.20x = 1,889,230.80 × 811,589.60
  4. Step 4: Simplify right side
    1,259,487.20x = 1,533,280,069,279.68
  5. Step 5: Solve for x
    x = 1,533,280,069,279.68/1,259,487.20
  6. Step 6: Final answer
    x = 1,217,384.40

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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.