Home / 820,185.20-1,230,277.80-459,986.30

Finding the Fourth Proportional to 820,185.20, 1,230,277.80 and 459,986.30

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Solution

The fourth proportional to 820,185.20, 1,230,277.80 and 459,986.30 is: 689,979.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,185.20 : 1,230,277.80 = 459,986.30 : x
  2. Step 2: Convert to fraction form
    820,185.20/1,230,277.80 = 459,986.30/x
  3. Step 3: Cross multiply
    820,185.20x = 1,230,277.80 × 459,986.30
  4. Step 4: Simplify right side
    820,185.20x = 565,910,933,194.14
  5. Step 5: Solve for x
    x = 565,910,933,194.14/820,185.20
  6. Step 6: Final answer
    x = 689,979.45

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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.