Home / 812,083.70-1,218,125.55-391,402.10

Finding the Fourth Proportional to 812,083.70, 1,218,125.55 and 391,402.10

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Solution

The fourth proportional to 812,083.70, 1,218,125.55 and 391,402.10 is: 587,103.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,083.70 : 1,218,125.55 = 391,402.10 : x
  2. Step 2: Convert to fraction form
    812,083.70/1,218,125.55 = 391,402.10/x
  3. Step 3: Cross multiply
    812,083.70x = 1,218,125.55 × 391,402.10
  4. Step 4: Simplify right side
    812,083.70x = 476,776,898,333.66
  5. Step 5: Solve for x
    x = 476,776,898,333.66/812,083.70
  6. Step 6: Final answer
    x = 587,103.15

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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.