Home / 816,138.20-1,224,207.30-442,890.20

Finding the Fourth Proportional to 816,138.20, 1,224,207.30 and 442,890.20

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Solution

The fourth proportional to 816,138.20, 1,224,207.30 and 442,890.20 is: 664,335.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    816,138.20 : 1,224,207.30 = 442,890.20 : x
  2. Step 2: Convert to fraction form
    816,138.20/1,224,207.30 = 442,890.20/x
  3. Step 3: Cross multiply
    816,138.20x = 1,224,207.30 × 442,890.20
  4. Step 4: Simplify right side
    816,138.20x = 542,189,415,938.46
  5. Step 5: Solve for x
    x = 542,189,415,938.46/816,138.20
  6. Step 6: Final answer
    x = 664,335.30

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Half scale
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Double scale
Find fourth proportional to 816,139.20, 1,224,208.80 and 442,891.20
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.