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Finding the Fourth Proportional to 922,666.10, 1,383,999.15 and 639,230.90

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Solution

The fourth proportional to 922,666.10, 1,383,999.15 and 639,230.90 is: 958,846.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    922,666.10 : 1,383,999.15 = 639,230.90 : x
  2. Step 2: Convert to fraction form
    922,666.10/1,383,999.15 = 639,230.90/x
  3. Step 3: Cross multiply
    922,666.10x = 1,383,999.15 × 639,230.90
  4. Step 4: Simplify right side
    922,666.10x = 884,695,022,253.74
  5. Step 5: Solve for x
    x = 884,695,022,253.74/922,666.10
  6. Step 6: Final answer
    x = 958,846.35

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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.