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Finding the Fourth Proportional to 713,835.65, 985,120.77 and 391,559.33

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Solution

The fourth proportional to 713,835.65, 985,120.77 and 391,559.33 is: 540,367.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,835.65 : 985,120.77 = 391,559.33 : x
  2. Step 2: Convert to fraction form
    713,835.65/985,120.77 = 391,559.33/x
  3. Step 3: Cross multiply
    713,835.65x = 985,120.77 × 391,559.33
  4. Step 4: Simplify right side
    713,835.65x = 385,733,223,744.68
  5. Step 5: Solve for x
    x = 385,733,223,744.68/713,835.65
  6. Step 6: Final answer
    x = 540,367.00

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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.