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Finding the Fourth Proportional to 680,767.66, 939,044.90 and 419,165.06

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Solution

The fourth proportional to 680,767.66, 939,044.90 and 419,165.06 is: 578,192.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,767.66 : 939,044.90 = 419,165.06 : x
  2. Step 2: Convert to fraction form
    680,767.66/939,044.90 = 419,165.06/x
  3. Step 3: Cross multiply
    680,767.66x = 939,044.90 × 419,165.06
  4. Step 4: Simplify right side
    680,767.66x = 393,614,811,851.19
  5. Step 5: Solve for x
    x = 393,614,811,851.19/680,767.66
  6. Step 6: Final answer
    x = 578,192.58

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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.