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Finding the Fourth Proportional to 379,813.22, 569,544.18 and 139,866.53

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Solution

The fourth proportional to 379,813.22, 569,544.18 and 139,866.53 is: 209,735.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,813.22 : 569,544.18 = 139,866.53 : x
  2. Step 2: Convert to fraction form
    379,813.22/569,544.18 = 139,866.53/x
  3. Step 3: Cross multiply
    379,813.22x = 569,544.18 × 139,866.53
  4. Step 4: Simplify right side
    379,813.22x = 79,660,168,138.30
  5. Step 5: Solve for x
    x = 79,660,168,138.30/379,813.22
  6. Step 6: Final answer
    x = 209,735.11

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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.