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Finding the Fourth Proportional to 620,147.70, 930,221.55 and 611,853.30

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Solution

The fourth proportional to 620,147.70, 930,221.55 and 611,853.30 is: 917,779.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,147.70 : 930,221.55 = 611,853.30 : x
  2. Step 2: Convert to fraction form
    620,147.70/930,221.55 = 611,853.30/x
  3. Step 3: Cross multiply
    620,147.70x = 930,221.55 × 611,853.30
  4. Step 4: Simplify right side
    620,147.70x = 569,159,125,098.62
  5. Step 5: Solve for x
    x = 569,159,125,098.62/620,147.70
  6. Step 6: Final answer
    x = 917,779.95

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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.