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Finding the Fourth Proportional to 713,763.15, 985,020.75 and 391,486.83

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Solution

The fourth proportional to 713,763.15, 985,020.75 and 391,486.83 is: 540,266.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,763.15 : 985,020.75 = 391,486.83 : x
  2. Step 2: Convert to fraction form
    713,763.15/985,020.75 = 391,486.83/x
  3. Step 3: Cross multiply
    713,763.15x = 985,020.75 × 391,486.83
  4. Step 4: Simplify right side
    713,763.15x = 385,622,650,901.72
  5. Step 5: Solve for x
    x = 385,622,650,901.72/713,763.15
  6. Step 6: Final answer
    x = 540,266.97

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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.