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Finding the Fourth Proportional to 515,813.40, 713,439.90 and 456,197.40

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Solution

The fourth proportional to 515,813.40, 713,439.90 and 456,197.40 is: 630,982.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,813.40 : 713,439.90 = 456,197.40 : x
  2. Step 2: Convert to fraction form
    515,813.40/713,439.90 = 456,197.40/x
  3. Step 3: Cross multiply
    515,813.40x = 713,439.90 × 456,197.40
  4. Step 4: Simplify right side
    515,813.40x = 325,469,427,436.26
  5. Step 5: Solve for x
    x = 325,469,427,436.26/515,813.40
  6. Step 6: Final answer
    x = 630,982.89

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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.