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Finding the Fourth Proportional to 619,401.70, 929,102.55 and 198,720.10

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Solution

The fourth proportional to 619,401.70, 929,102.55 and 198,720.10 is: 298,080.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,401.70 : 929,102.55 = 198,720.10 : x
  2. Step 2: Convert to fraction form
    619,401.70/929,102.55 = 198,720.10/x
  3. Step 3: Cross multiply
    619,401.70x = 929,102.55 × 198,720.10
  4. Step 4: Simplify right side
    619,401.70x = 184,631,351,646.26
  5. Step 5: Solve for x
    x = 184,631,351,646.26/619,401.70
  6. Step 6: Final answer
    x = 298,080.15

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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.