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Finding the Fourth Proportional to 379,421.76, 569,054.88 and 139,452.96

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Solution

The fourth proportional to 379,421.76, 569,054.88 and 139,452.96 is: 209,150.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,421.76 : 569,054.88 = 139,452.96 : x
  2. Step 2: Convert to fraction form
    379,421.76/569,054.88 = 139,452.96/x
  3. Step 3: Cross multiply
    379,421.76x = 569,054.88 × 139,452.96
  4. Step 4: Simplify right side
    379,421.76x = 79,356,387,418.44
  5. Step 5: Solve for x
    x = 79,356,387,418.44/379,421.76
  6. Step 6: Final answer
    x = 209,150.86

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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.