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Finding the Fourth Proportional to 415,507.47, 623,261.21 and 99,964.37

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Solution

The fourth proportional to 415,507.47, 623,261.21 and 99,964.37 is: 149,946.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,507.47 : 623,261.21 = 99,964.37 : x
  2. Step 2: Convert to fraction form
    415,507.47/623,261.21 = 99,964.37/x
  3. Step 3: Cross multiply
    415,507.47x = 623,261.21 × 99,964.37
  4. Step 4: Simplify right side
    415,507.47x = 62,303,914,203.09
  5. Step 5: Solve for x
    x = 62,303,914,203.09/415,507.47
  6. Step 6: Final answer
    x = 149,946.56

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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.