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Finding the Fourth Proportional to 274,310.40, 378,583.20 and 153,458.40

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Solution

The fourth proportional to 274,310.40, 378,583.20 and 153,458.40 is: 211,792.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,310.40 : 378,583.20 = 153,458.40 : x
  2. Step 2: Convert to fraction form
    274,310.40/378,583.20 = 153,458.40/x
  3. Step 3: Cross multiply
    274,310.40x = 378,583.20 × 153,458.40
  4. Step 4: Simplify right side
    274,310.40x = 58,096,772,138.88
  5. Step 5: Solve for x
    x = 58,096,772,138.88/274,310.40
  6. Step 6: Final answer
    x = 211,792.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.