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Finding the Fourth Proportional to 886,860.60, 1,330,290.90 and 620,921.40

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Solution

The fourth proportional to 886,860.60, 1,330,290.90 and 620,921.40 is: 931,382.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    886,860.60 : 1,330,290.90 = 620,921.40 : x
  2. Step 2: Convert to fraction form
    886,860.60/1,330,290.90 = 620,921.40/x
  3. Step 3: Cross multiply
    886,860.60x = 1,330,290.90 × 620,921.40
  4. Step 4: Simplify right side
    886,860.60x = 826,006,088,035.26
  5. Step 5: Solve for x
    x = 826,006,088,035.26/886,860.60
  6. Step 6: Final answer
    x = 931,382.10

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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.