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Finding the Fourth Proportional to 418,888.07, 628,332.11 and 194,218.93

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Solution

The fourth proportional to 418,888.07, 628,332.11 and 194,218.93 is: 291,328.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,888.07 : 628,332.11 = 194,218.93 : x
  2. Step 2: Convert to fraction form
    418,888.07/628,332.11 = 194,218.93/x
  3. Step 3: Cross multiply
    418,888.07x = 628,332.11 × 194,218.93
  4. Step 4: Simplify right side
    418,888.07x = 122,033,987,297.91
  5. Step 5: Solve for x
    x = 122,033,987,297.91/418,888.07
  6. Step 6: Final answer
    x = 291,328.39

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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.