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Finding the Fourth Proportional to 460,846.80, 691,270.20 and 128,422.80

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Solution

The fourth proportional to 460,846.80, 691,270.20 and 128,422.80 is: 192,634.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    460,846.80 : 691,270.20 = 128,422.80 : x
  2. Step 2: Convert to fraction form
    460,846.80/691,270.20 = 128,422.80/x
  3. Step 3: Cross multiply
    460,846.80x = 691,270.20 × 128,422.80
  4. Step 4: Simplify right side
    460,846.80x = 88,774,854,640.56
  5. Step 5: Solve for x
    x = 88,774,854,640.56/460,846.80
  6. Step 6: Final answer
    x = 192,634.20

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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.