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Finding the Fourth Proportional to 621,289.36, 857,374.92 and 353,017.36

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Solution

The fourth proportional to 621,289.36, 857,374.92 and 353,017.36 is: 487,161.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,289.36 : 857,374.92 = 353,017.36 : x
  2. Step 2: Convert to fraction form
    621,289.36/857,374.92 = 353,017.36/x
  3. Step 3: Cross multiply
    621,289.36x = 857,374.92 × 353,017.36
  4. Step 4: Simplify right side
    621,289.36x = 302,668,230,788.61
  5. Step 5: Solve for x
    x = 302,668,230,788.61/621,289.36
  6. Step 6: Final answer
    x = 487,161.46

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Double scale
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Similar ratio
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1.5x scale

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.