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Finding the Fourth Proportional to 386,422.65, 579,523.21 and 130,227.33

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Solution

The fourth proportional to 386,422.65, 579,523.21 and 130,227.33 is: 195,303.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,422.65 : 579,523.21 = 130,227.33 : x
  2. Step 2: Convert to fraction form
    386,422.65/579,523.21 = 130,227.33/x
  3. Step 3: Cross multiply
    386,422.65x = 579,523.21 × 130,227.33
  4. Step 4: Simplify right side
    386,422.65x = 75,469,756,762.58
  5. Step 5: Solve for x
    x = 75,469,756,762.58/386,422.65
  6. Step 6: Final answer
    x = 195,303.66

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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.