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Finding the Fourth Proportional to 709,782.65, 979,586.00 and 403,933.43

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Solution

The fourth proportional to 709,782.65, 979,586.00 and 403,933.43 is: 557,477.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,782.65 : 979,586.00 = 403,933.43 : x
  2. Step 2: Convert to fraction form
    709,782.65/979,586.00 = 403,933.43/x
  3. Step 3: Cross multiply
    709,782.65x = 979,586.00 × 403,933.43
  4. Step 4: Simplify right side
    709,782.65x = 395,687,537,176.15
  5. Step 5: Solve for x
    x = 395,687,537,176.15/709,782.65
  6. Step 6: Final answer
    x = 557,477.05

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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.