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Finding the Fourth Proportional to 619,236.80, 927,472.80 and 478,539.20

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Solution

The fourth proportional to 619,236.80, 927,472.80 and 478,539.20 is: 716,740.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,236.80 : 927,472.80 = 478,539.20 : x
  2. Step 2: Convert to fraction form
    619,236.80/927,472.80 = 478,539.20/x
  3. Step 3: Cross multiply
    619,236.80x = 927,472.80 × 478,539.20
  4. Step 4: Simplify right side
    619,236.80x = 443,832,091,733.76
  5. Step 5: Solve for x
    x = 443,832,091,733.76/619,236.80
  6. Step 6: Final answer
    x = 716,740.50

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Double scale
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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.