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Finding the Fourth Proportional to 368,128.20, 551,414.70 and 305,920.20

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Solution

The fourth proportional to 368,128.20, 551,414.70 and 305,920.20 is: 458,234.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,128.20 : 551,414.70 = 305,920.20 : x
  2. Step 2: Convert to fraction form
    368,128.20/551,414.70 = 305,920.20/x
  3. Step 3: Cross multiply
    368,128.20x = 551,414.70 × 305,920.20
  4. Step 4: Simplify right side
    368,128.20x = 168,688,895,306.94
  5. Step 5: Solve for x
    x = 168,688,895,306.94/368,128.20
  6. Step 6: Final answer
    x = 458,234.10

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1.5x scale

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.