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Finding the Fourth Proportional to 411,566.80, 618,662.40 and 387,947.20

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Solution

The fourth proportional to 411,566.80, 618,662.40 and 387,947.20 is: 583,157.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,566.80 : 618,662.40 = 387,947.20 : x
  2. Step 2: Convert to fraction form
    411,566.80/618,662.40 = 387,947.20/x
  3. Step 3: Cross multiply
    411,566.80x = 618,662.40 × 387,947.20
  4. Step 4: Simplify right side
    411,566.80x = 240,008,345,825.28
  5. Step 5: Solve for x
    x = 240,008,345,825.28/411,566.80
  6. Step 6: Final answer
    x = 583,157.69

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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.