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Finding the Fourth Proportional to 523,988.40, 784,816.20 and 405,015.60

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Solution

The fourth proportional to 523,988.40, 784,816.20 and 405,015.60 is: 606,621.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    523,988.40 : 784,816.20 = 405,015.60 : x
  2. Step 2: Convert to fraction form
    523,988.40/784,816.20 = 405,015.60/x
  3. Step 3: Cross multiply
    523,988.40x = 784,816.20 × 405,015.60
  4. Step 4: Simplify right side
    523,988.40x = 317,862,804,132.72
  5. Step 5: Solve for x
    x = 317,862,804,132.72/523,988.40
  6. Step 6: Final answer
    x = 606,621.83

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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.