Home / 386,427.20-579,640.80-293,115.20

Finding the Fourth Proportional to 386,427.20, 579,640.80 and 293,115.20

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Solution

The fourth proportional to 386,427.20, 579,640.80 and 293,115.20 is: 439,672.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,427.20 : 579,640.80 = 293,115.20 : x
  2. Step 2: Convert to fraction form
    386,427.20/579,640.80 = 293,115.20/x
  3. Step 3: Cross multiply
    386,427.20x = 579,640.80 × 293,115.20
  4. Step 4: Simplify right side
    386,427.20x = 169,901,529,020.16
  5. Step 5: Solve for x
    x = 169,901,529,020.16/386,427.20
  6. Step 6: Final answer
    x = 439,672.80

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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.