Home / 729,121.80-1,093,682.70-445,686.60

Finding the Fourth Proportional to 729,121.80, 1,093,682.70 and 445,686.60

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Solution

The fourth proportional to 729,121.80, 1,093,682.70 and 445,686.60 is: 668,529.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    729,121.80 : 1,093,682.70 = 445,686.60 : x
  2. Step 2: Convert to fraction form
    729,121.80/1,093,682.70 = 445,686.60/x
  3. Step 3: Cross multiply
    729,121.80x = 1,093,682.70 × 445,686.60
  4. Step 4: Simplify right side
    729,121.80x = 487,439,724,041.82
  5. Step 5: Solve for x
    x = 487,439,724,041.82/729,121.80
  6. Step 6: Final answer
    x = 668,529.90

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Double scale
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Similar ratio
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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.