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Finding the Fourth Proportional to 619,868.70, 929,803.05 and 354,148.20

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Solution

The fourth proportional to 619,868.70, 929,803.05 and 354,148.20 is: 531,222.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,868.70 : 929,803.05 = 354,148.20 : x
  2. Step 2: Convert to fraction form
    619,868.70/929,803.05 = 354,148.20/x
  3. Step 3: Cross multiply
    619,868.70x = 929,803.05 × 354,148.20
  4. Step 4: Simplify right side
    619,868.70x = 329,288,076,512.01
  5. Step 5: Solve for x
    x = 329,288,076,512.01/619,868.70
  6. Step 6: Final answer
    x = 531,222.30

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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.