Home / 820,378.20-1,230,567.30-654,490.20

Finding the Fourth Proportional to 820,378.20, 1,230,567.30 and 654,490.20

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Solution

The fourth proportional to 820,378.20, 1,230,567.30 and 654,490.20 is: 981,735.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,378.20 : 1,230,567.30 = 654,490.20 : x
  2. Step 2: Convert to fraction form
    820,378.20/1,230,567.30 = 654,490.20/x
  3. Step 3: Cross multiply
    820,378.20x = 1,230,567.30 × 654,490.20
  4. Step 4: Simplify right side
    820,378.20x = 805,394,238,290.46
  5. Step 5: Solve for x
    x = 805,394,238,290.46/820,378.20
  6. Step 6: Final answer
    x = 981,735.30

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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.