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Finding the Fourth Proportional to 379,890.74, 569,820.27 and 99,401.78

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Solution

The fourth proportional to 379,890.74, 569,820.27 and 99,401.78 is: 149,098.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,890.74 : 569,820.27 = 99,401.78 : x
  2. Step 2: Convert to fraction form
    379,890.74/569,820.27 = 99,401.78/x
  3. Step 3: Cross multiply
    379,890.74x = 569,820.27 × 99,401.78
  4. Step 4: Simplify right side
    379,890.74x = 56,641,149,118.08
  5. Step 5: Solve for x
    x = 56,641,149,118.08/379,890.74
  6. Step 6: Final answer
    x = 149,098.53

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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.