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Finding the Fourth Proportional to 415,936.40, 623,904.60 and 345,952.40

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Solution

The fourth proportional to 415,936.40, 623,904.60 and 345,952.40 is: 518,928.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,936.40 : 623,904.60 = 345,952.40 : x
  2. Step 2: Convert to fraction form
    415,936.40/623,904.60 = 345,952.40/x
  3. Step 3: Cross multiply
    415,936.40x = 623,904.60 × 345,952.40
  4. Step 4: Simplify right side
    415,936.40x = 215,841,293,741.04
  5. Step 5: Solve for x
    x = 215,841,293,741.04/415,936.40
  6. Step 6: Final answer
    x = 518,928.60

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Half scale
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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.