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Finding the Fourth Proportional to 516,393.60, 712,583.28 and 289,995.36

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Solution

The fourth proportional to 516,393.60, 712,583.28 and 289,995.36 is: 400,171.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    516,393.60 : 712,583.28 = 289,995.36 : x
  2. Step 2: Convert to fraction form
    516,393.60/712,583.28 = 289,995.36/x
  3. Step 3: Cross multiply
    516,393.60x = 712,583.28 × 289,995.36
  4. Step 4: Simplify right side
    516,393.60x = 206,645,844,813.58
  5. Step 5: Solve for x
    x = 206,645,844,813.58/516,393.60
  6. Step 6: Final answer
    x = 400,171.20

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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.