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Finding the Fourth Proportional to 431,390.70, 647,086.05 and 401,866.20

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Solution

The fourth proportional to 431,390.70, 647,086.05 and 401,866.20 is: 602,799.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,390.70 : 647,086.05 = 401,866.20 : x
  2. Step 2: Convert to fraction form
    431,390.70/647,086.05 = 401,866.20/x
  3. Step 3: Cross multiply
    431,390.70x = 647,086.05 × 401,866.20
  4. Step 4: Simplify right side
    431,390.70x = 260,042,011,986.51
  5. Step 5: Solve for x
    x = 260,042,011,986.51/431,390.70
  6. Step 6: Final answer
    x = 602,799.30

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Similar ratio
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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.