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Finding the Fourth Proportional to 865,630.30, 1,298,445.45 and 853,188.70

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Solution

The fourth proportional to 865,630.30, 1,298,445.45 and 853,188.70 is: 1,279,783.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,630.30 : 1,298,445.45 = 853,188.70 : x
  2. Step 2: Convert to fraction form
    865,630.30/1,298,445.45 = 853,188.70/x
  3. Step 3: Cross multiply
    865,630.30x = 1,298,445.45 × 853,188.70
  4. Step 4: Simplify right side
    865,630.30x = 1,107,818,985,506.41
  5. Step 5: Solve for x
    x = 1,107,818,985,506.41/865,630.30
  6. Step 6: Final answer
    x = 1,279,783.05

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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.