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Finding the Fourth Proportional to 644,560.60, 889,635.90 and 358,179.16

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Solution

The fourth proportional to 644,560.60, 889,635.90 and 358,179.16 is: 494,366.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,560.60 : 889,635.90 = 358,179.16 : x
  2. Step 2: Convert to fraction form
    644,560.60/889,635.90 = 358,179.16/x
  3. Step 3: Cross multiply
    644,560.60x = 889,635.90 × 358,179.16
  4. Step 4: Simplify right side
    644,560.60x = 318,649,039,367.84
  5. Step 5: Solve for x
    x = 318,649,039,367.84/644,560.60
  6. Step 6: Final answer
    x = 494,366.30

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.