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Finding the Fourth Proportional to 612,853.10, 919,279.65 and 192,128.30

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Solution

The fourth proportional to 612,853.10, 919,279.65 and 192,128.30 is: 288,192.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,853.10 : 919,279.65 = 192,128.30 : x
  2. Step 2: Convert to fraction form
    612,853.10/919,279.65 = 192,128.30/x
  3. Step 3: Cross multiply
    612,853.10x = 919,279.65 × 192,128.30
  4. Step 4: Simplify right side
    612,853.10x = 176,619,636,379.10
  5. Step 5: Solve for x
    x = 176,619,636,379.10/612,853.10
  6. Step 6: Final answer
    x = 288,192.45

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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.