Home / 386,723.40-579,393.90-331,427.40

Finding the Fourth Proportional to 386,723.40, 579,393.90 and 331,427.40

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Solution

The fourth proportional to 386,723.40, 579,393.90 and 331,427.40 is: 496,548.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,723.40 : 579,393.90 = 331,427.40 : x
  2. Step 2: Convert to fraction form
    386,723.40/579,393.90 = 331,427.40/x
  3. Step 3: Cross multiply
    386,723.40x = 579,393.90 × 331,427.40
  4. Step 4: Simplify right side
    386,723.40x = 192,027,013,852.86
  5. Step 5: Solve for x
    x = 192,027,013,852.86/386,723.40
  6. Step 6: Final answer
    x = 496,548.73

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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.