Home / 809,346.80-1,214,020.20-388,521.20

Finding the Fourth Proportional to 809,346.80, 1,214,020.20 and 388,521.20

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Solution

The fourth proportional to 809,346.80, 1,214,020.20 and 388,521.20 is: 582,781.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,346.80 : 1,214,020.20 = 388,521.20 : x
  2. Step 2: Convert to fraction form
    809,346.80/1,214,020.20 = 388,521.20/x
  3. Step 3: Cross multiply
    809,346.80x = 1,214,020.20 × 388,521.20
  4. Step 4: Simplify right side
    809,346.80x = 471,672,584,928.24
  5. Step 5: Solve for x
    x = 471,672,584,928.24/809,346.80
  6. Step 6: Final answer
    x = 582,781.80

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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.