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Finding the Fourth Proportional to 612,679.08, 919,019.02 and 191,987.76

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Solution

The fourth proportional to 612,679.08, 919,019.02 and 191,987.76 is: 287,981.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,679.08 : 919,019.02 = 191,987.76 : x
  2. Step 2: Convert to fraction form
    612,679.08/919,019.02 = 191,987.76/x
  3. Step 3: Cross multiply
    612,679.08x = 919,019.02 × 191,987.76
  4. Step 4: Simplify right side
    612,679.08x = 176,440,403,047.20
  5. Step 5: Solve for x
    x = 176,440,403,047.20/612,679.08
  6. Step 6: Final answer
    x = 287,981.77

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Double scale
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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.