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Finding the Fourth Proportional to 379,744.34, 569,673.14 and 139,839.78

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Solution

The fourth proportional to 379,744.34, 569,673.14 and 139,839.78 is: 209,780.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,744.34 : 569,673.14 = 139,839.78 : x
  2. Step 2: Convert to fraction form
    379,744.34/569,673.14 = 139,839.78/x
  3. Step 3: Cross multiply
    379,744.34x = 569,673.14 × 139,839.78
  4. Step 4: Simplify right side
    379,744.34x = 79,662,966,193.23
  5. Step 5: Solve for x
    x = 79,662,966,193.23/379,744.34
  6. Step 6: Final answer
    x = 209,780.52

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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.