Home / 386,320.20-579,480.30-339,625.80

Finding the Fourth Proportional to 386,320.20, 579,480.30 and 339,625.80

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Solution

The fourth proportional to 386,320.20, 579,480.30 and 339,625.80 is: 509,438.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,320.20 : 579,480.30 = 339,625.80 : x
  2. Step 2: Convert to fraction form
    386,320.20/579,480.30 = 339,625.80/x
  3. Step 3: Cross multiply
    386,320.20x = 579,480.30 × 339,625.80
  4. Step 4: Simplify right side
    386,320.20x = 196,806,460,471.74
  5. Step 5: Solve for x
    x = 196,806,460,471.74/386,320.20
  6. Step 6: Final answer
    x = 509,438.70

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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.