Home / 1,391,186.18-2,086,977.36-431,724.69

Finding the Fourth Proportional to 1,391,186.18, 2,086,977.36 and 431,724.69

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Solution

The fourth proportional to 1,391,186.18, 2,086,977.36 and 431,724.69 is: 647,648.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,186.18 : 2,086,977.36 = 431,724.69 : x
  2. Step 2: Convert to fraction form
    1,391,186.18/2,086,977.36 = 431,724.69/x
  3. Step 3: Cross multiply
    1,391,186.18x = 2,086,977.36 × 431,724.69
  4. Step 4: Simplify right side
    1,391,186.18x = 900,999,653,783.02
  5. Step 5: Solve for x
    x = 900,999,653,783.02/1,391,186.18
  6. Step 6: Final answer
    x = 647,648.51

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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.