Home / 728,173.98-1,005,311.18-647,378.34

Finding the Fourth Proportional to 728,173.98, 1,005,311.18 and 647,378.34

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Solution

The fourth proportional to 728,173.98, 1,005,311.18 and 647,378.34 is: 893,765.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,173.98 : 1,005,311.18 = 647,378.34 : x
  2. Step 2: Convert to fraction form
    728,173.98/1,005,311.18 = 647,378.34/x
  3. Step 3: Cross multiply
    728,173.98x = 1,005,311.18 × 647,378.34
  4. Step 4: Simplify right side
    728,173.98x = 650,816,682,891.84
  5. Step 5: Solve for x
    x = 650,816,682,891.84/728,173.98
  6. Step 6: Final answer
    x = 893,765.36

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Double scale
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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.