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Finding the Fourth Proportional to 379,579.96, 569,429 and 126,782.20

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Solution

The fourth proportional to 379,579.96, 569,429 and 126,782.20 is: 190,193.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,579.96 : 569,429 = 126,782.20 : x
  2. Step 2: Convert to fraction form
    379,579.96/569,429 = 126,782.20/x
  3. Step 3: Cross multiply
    379,579.96x = 569,429 × 126,782.20
  4. Step 4: Simplify right side
    379,579.96x = 72,193,461,363.80
  5. Step 5: Solve for x
    x = 72,193,461,363.80/379,579.96
  6. Step 6: Final answer
    x = 190,193.03

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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.