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Finding the Fourth Proportional to 620,779.02, 931,168.53 and 221,403.66

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Solution

The fourth proportional to 620,779.02, 931,168.53 and 221,403.66 is: 332,105.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,779.02 : 931,168.53 = 221,403.66 : x
  2. Step 2: Convert to fraction form
    620,779.02/931,168.53 = 221,403.66/x
  3. Step 3: Cross multiply
    620,779.02x = 931,168.53 × 221,403.66
  4. Step 4: Simplify right side
    620,779.02x = 206,164,120,618.82
  5. Step 5: Solve for x
    x = 206,164,120,618.82/620,779.02
  6. Step 6: Final answer
    x = 332,105.49

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.