Home / 1,421,156.10-1,961,171.64-776,561.43

Finding the Fourth Proportional to 1,421,156.10, 1,961,171.64 and 776,561.43

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Solution

The fourth proportional to 1,421,156.10, 1,961,171.64 and 776,561.43 is: 1,071,641.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421,156.10 : 1,961,171.64 = 776,561.43 : x
  2. Step 2: Convert to fraction form
    1,421,156.10/1,961,171.64 = 776,561.43/x
  3. Step 3: Cross multiply
    1,421,156.10x = 1,961,171.64 × 776,561.43
  4. Step 4: Simplify right side
    1,421,156.10x = 1,522,970,253,233.85
  5. Step 5: Solve for x
    x = 1,522,970,253,233.85/1,421,156.10
  6. Step 6: Final answer
    x = 1,071,641.78

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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.