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Finding the Fourth Proportional to 865,561.40, 1,298,342.10 and 853,751.60

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Solution

The fourth proportional to 865,561.40, 1,298,342.10 and 853,751.60 is: 1,280,627.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,561.40 : 1,298,342.10 = 853,751.60 : x
  2. Step 2: Convert to fraction form
    865,561.40/1,298,342.10 = 853,751.60/x
  3. Step 3: Cross multiply
    865,561.40x = 1,298,342.10 × 853,751.60
  4. Step 4: Simplify right side
    865,561.40x = 1,108,461,645,222.36
  5. Step 5: Solve for x
    x = 1,108,461,645,222.36/865,561.40
  6. Step 6: Final answer
    x = 1,280,627.40

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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.