Home / 1,389,811.64-1,917,851.18-777,861.50

Finding the Fourth Proportional to 1,389,811.64, 1,917,851.18 and 777,861.50

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Solution

The fourth proportional to 1,389,811.64, 1,917,851.18 and 777,861.50 is: 1,073,399.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,811.64 : 1,917,851.18 = 777,861.50 : x
  2. Step 2: Convert to fraction form
    1,389,811.64/1,917,851.18 = 777,861.50/x
  3. Step 3: Cross multiply
    1,389,811.64x = 1,917,851.18 × 777,861.50
  4. Step 4: Simplify right side
    1,389,811.64x = 1,491,822,582,173.01
  5. Step 5: Solve for x
    x = 1,491,822,582,173.01/1,389,811.64
  6. Step 6: Final answer
    x = 1,073,399.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.