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Finding the Fourth Proportional to 639,474.76, 882,737.96 and 436,196.68

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Solution

The fourth proportional to 639,474.76, 882,737.96 and 436,196.68 is: 602,130.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,474.76 : 882,737.96 = 436,196.68 : x
  2. Step 2: Convert to fraction form
    639,474.76/882,737.96 = 436,196.68/x
  3. Step 3: Cross multiply
    639,474.76x = 882,737.96 × 436,196.68
  4. Step 4: Simplify right side
    639,474.76x = 385,047,367,461.97
  5. Step 5: Solve for x
    x = 385,047,367,461.97/639,474.76
  6. Step 6: Final answer
    x = 602,130.67

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.