Home / 805,415.20-1,208,122.80-331,856.80

Finding the Fourth Proportional to 805,415.20, 1,208,122.80 and 331,856.80

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Solution

The fourth proportional to 805,415.20, 1,208,122.80 and 331,856.80 is: 497,785.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    805,415.20 : 1,208,122.80 = 331,856.80 : x
  2. Step 2: Convert to fraction form
    805,415.20/1,208,122.80 = 331,856.80/x
  3. Step 3: Cross multiply
    805,415.20x = 1,208,122.80 × 331,856.80
  4. Step 4: Simplify right side
    805,415.20x = 400,923,766,415.04
  5. Step 5: Solve for x
    x = 400,923,766,415.04/805,415.20
  6. Step 6: Final answer
    x = 497,785.20

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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.