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Finding the Fourth Proportional to 379,809.72, 569,538.93 and 139,863.03

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Solution

The fourth proportional to 379,809.72, 569,538.93 and 139,863.03 is: 209,729.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,809.72 : 569,538.93 = 139,863.03 : x
  2. Step 2: Convert to fraction form
    379,809.72/569,538.93 = 139,863.03/x
  3. Step 3: Cross multiply
    379,809.72x = 569,538.93 × 139,863.03
  4. Step 4: Simplify right side
    379,809.72x = 79,657,440,452.76
  5. Step 5: Solve for x
    x = 79,657,440,452.76/379,809.72
  6. Step 6: Final answer
    x = 209,729.86

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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.