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Finding the Fourth Proportional to 386,874.15, 579,819.15 and 344,555.70

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Solution

The fourth proportional to 386,874.15, 579,819.15 and 344,555.70 is: 516,395.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,874.15 : 579,819.15 = 344,555.70 : x
  2. Step 2: Convert to fraction form
    386,874.15/579,819.15 = 344,555.70/x
  3. Step 3: Cross multiply
    386,874.15x = 579,819.15 × 344,555.70
  4. Step 4: Simplify right side
    386,874.15x = 199,779,993,101.66
  5. Step 5: Solve for x
    x = 199,779,993,101.66/386,874.15
  6. Step 6: Final answer
    x = 516,395.30

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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.