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Finding the Fourth Proportional to 1,288,863.60, 1,933,986.60 and 540,985.20

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Solution

The fourth proportional to 1,288,863.60, 1,933,986.60 and 540,985.20 is: 811,767.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,863.60 : 1,933,986.60 = 540,985.20 : x
  2. Step 2: Convert to fraction form
    1,288,863.60/1,933,986.60 = 540,985.20/x
  3. Step 3: Cross multiply
    1,288,863.60x = 1,933,986.60 × 540,985.20
  4. Step 4: Simplify right side
    1,288,863.60x = 1,046,258,127,598.32
  5. Step 5: Solve for x
    x = 1,046,258,127,598.32/1,288,863.60
  6. Step 6: Final answer
    x = 811,767.92

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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.