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Finding the Fourth Proportional to 619,687.10, 929,530.65 and 407,110.70

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Solution

The fourth proportional to 619,687.10, 929,530.65 and 407,110.70 is: 610,666.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,687.10 : 929,530.65 = 407,110.70 : x
  2. Step 2: Convert to fraction form
    619,687.10/929,530.65 = 407,110.70/x
  3. Step 3: Cross multiply
    619,687.10x = 929,530.65 × 407,110.70
  4. Step 4: Simplify right side
    619,687.10x = 378,421,873,592.96
  5. Step 5: Solve for x
    x = 378,421,873,592.96/619,687.10
  6. Step 6: Final answer
    x = 610,666.05

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Similar ratio
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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.