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Finding the Fourth Proportional to 612,861.40, 919,291.98 and 192,171.16

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Solution

The fourth proportional to 612,861.40, 919,291.98 and 192,171.16 is: 288,256.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,861.40 : 919,291.98 = 192,171.16 : x
  2. Step 2: Convert to fraction form
    612,861.40/919,291.98 = 192,171.16/x
  3. Step 3: Cross multiply
    612,861.40x = 919,291.98 × 192,171.16
  4. Step 4: Simplify right side
    612,861.40x = 176,661,406,175.30
  5. Step 5: Solve for x
    x = 176,661,406,175.30/612,861.40
  6. Step 6: Final answer
    x = 288,256.70

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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.