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Finding the Fourth Proportional to 625,283.71, 863,189.06 and 418,907.45

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Solution

The fourth proportional to 625,283.71, 863,189.06 and 418,907.45 is: 578,291.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,283.71 : 863,189.06 = 418,907.45 : x
  2. Step 2: Convert to fraction form
    625,283.71/863,189.06 = 418,907.45/x
  3. Step 3: Cross multiply
    625,283.71x = 863,189.06 × 418,907.45
  4. Step 4: Simplify right side
    625,283.71x = 361,596,328,055.93
  5. Step 5: Solve for x
    x = 361,596,328,055.93/625,283.71
  6. Step 6: Final answer
    x = 578,291.62

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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.