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Finding the Fourth Proportional to 403,399.20, 605,536.20 and 253,808.40

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Solution

The fourth proportional to 403,399.20, 605,536.20 and 253,808.40 is: 380,987.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,399.20 : 605,536.20 = 253,808.40 : x
  2. Step 2: Convert to fraction form
    403,399.20/605,536.20 = 253,808.40/x
  3. Step 3: Cross multiply
    403,399.20x = 605,536.20 × 253,808.40
  4. Step 4: Simplify right side
    403,399.20x = 153,690,174,064.08
  5. Step 5: Solve for x
    x = 153,690,174,064.08/403,399.20
  6. Step 6: Final answer
    x = 380,987.80

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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.