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Finding the Fourth Proportional to 347,970.75, 521,956.14 and 85,314.75

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Solution

The fourth proportional to 347,970.75, 521,956.14 and 85,314.75 is: 127,972.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,970.75 : 521,956.14 = 85,314.75 : x
  2. Step 2: Convert to fraction form
    347,970.75/521,956.14 = 85,314.75/x
  3. Step 3: Cross multiply
    347,970.75x = 521,956.14 × 85,314.75
  4. Step 4: Simplify right side
    347,970.75x = 44,530,557,595.07
  5. Step 5: Solve for x
    x = 44,530,557,595.07/347,970.75
  6. Step 6: Final answer
    x = 127,972.13

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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.