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Finding the Fourth Proportional to 379,511.32, 569,201.08 and 142,855.80

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Solution

The fourth proportional to 379,511.32, 569,201.08 and 142,855.80 is: 214,258.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,511.32 : 569,201.08 = 142,855.80 : x
  2. Step 2: Convert to fraction form
    379,511.32/569,201.08 = 142,855.80/x
  3. Step 3: Cross multiply
    379,511.32x = 569,201.08 × 142,855.80
  4. Step 4: Simplify right side
    379,511.32x = 81,313,675,644.26
  5. Step 5: Solve for x
    x = 81,313,675,644.26/379,511.32
  6. Step 6: Final answer
    x = 214,258.89

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1.5x scale

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.