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Finding the Fourth Proportional to 619,689.10, 929,533.65 and 407,112.70

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Solution

The fourth proportional to 619,689.10, 929,533.65 and 407,112.70 is: 610,669.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,689.10 : 929,533.65 = 407,112.70 : x
  2. Step 2: Convert to fraction form
    619,689.10/929,533.65 = 407,112.70/x
  3. Step 3: Cross multiply
    619,689.10x = 929,533.65 × 407,112.70
  4. Step 4: Simplify right side
    619,689.10x = 378,424,953,992.36
  5. Step 5: Solve for x
    x = 378,424,953,992.36/619,689.10
  6. Step 6: Final answer
    x = 610,669.05

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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.