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Finding the Fourth Proportional to 445,512.80, 668,269.20 and 312,543.20

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Solution

The fourth proportional to 445,512.80, 668,269.20 and 312,543.20 is: 468,814.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,512.80 : 668,269.20 = 312,543.20 : x
  2. Step 2: Convert to fraction form
    445,512.80/668,269.20 = 312,543.20/x
  3. Step 3: Cross multiply
    445,512.80x = 668,269.20 × 312,543.20
  4. Step 4: Simplify right side
    445,512.80x = 208,862,994,229.44
  5. Step 5: Solve for x
    x = 208,862,994,229.44/445,512.80
  6. Step 6: Final answer
    x = 468,814.80

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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.