Home / 1,392,306.35-1,921,500.29-780,449.36

Finding the Fourth Proportional to 1,392,306.35, 1,921,500.29 and 780,449.36

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Solution

The fourth proportional to 1,392,306.35, 1,921,500.29 and 780,449.36 is: 1,077,086.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392,306.35 : 1,921,500.29 = 780,449.36 : x
  2. Step 2: Convert to fraction form
    1,392,306.35/1,921,500.29 = 780,449.36/x
  3. Step 3: Cross multiply
    1,392,306.35x = 1,921,500.29 × 780,449.36
  4. Step 4: Simplify right side
    1,392,306.35x = 1,499,633,678,325.19
  5. Step 5: Solve for x
    x = 1,499,633,678,325.19/1,392,306.35
  6. Step 6: Final answer
    x = 1,077,086.00

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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.