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Finding the Fourth Proportional to 379,422.76, 569,056.38 and 139,453.96

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Solution

The fourth proportional to 379,422.76, 569,056.38 and 139,453.96 is: 209,152.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,422.76 : 569,056.38 = 139,453.96 : x
  2. Step 2: Convert to fraction form
    379,422.76/569,056.38 = 139,453.96/x
  3. Step 3: Cross multiply
    379,422.76x = 569,056.38 × 139,453.96
  4. Step 4: Simplify right side
    379,422.76x = 79,357,165,654.26
  5. Step 5: Solve for x
    x = 79,357,165,654.26/379,422.76
  6. Step 6: Final answer
    x = 209,152.36

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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.