Home / 811,408.50-1,215,669.32-691,867.08

Finding the Fourth Proportional to 811,408.50, 1,215,669.32 and 691,867.08

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Solution

The fourth proportional to 811,408.50, 1,215,669.32 and 691,867.08 is: 1,036,569.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,408.50 : 1,215,669.32 = 691,867.08 : x
  2. Step 2: Convert to fraction form
    811,408.50/1,215,669.32 = 691,867.08/x
  3. Step 3: Cross multiply
    811,408.50x = 1,215,669.32 × 691,867.08
  4. Step 4: Simplify right side
    811,408.50x = 841,081,582,673.99
  5. Step 5: Solve for x
    x = 841,081,582,673.99/811,408.50
  6. Step 6: Final answer
    x = 1,036,569.84

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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.