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Finding the Fourth Proportional to 445,409.40, 668,114.10 and 345,876.60

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Solution

The fourth proportional to 445,409.40, 668,114.10 and 345,876.60 is: 518,814.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,409.40 : 668,114.10 = 345,876.60 : x
  2. Step 2: Convert to fraction form
    445,409.40/668,114.10 = 345,876.60/x
  3. Step 3: Cross multiply
    445,409.40x = 668,114.10 × 345,876.60
  4. Step 4: Simplify right side
    445,409.40x = 231,085,033,320.06
  5. Step 5: Solve for x
    x = 231,085,033,320.06/445,409.40
  6. Step 6: Final answer
    x = 518,814.90

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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.