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Finding the Fourth Proportional to 271,760.60, 407,640.90 and 170,721.20

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Solution

The fourth proportional to 271,760.60, 407,640.90 and 170,721.20 is: 256,081.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    271,760.60 : 407,640.90 = 170,721.20 : x
  2. Step 2: Convert to fraction form
    271,760.60/407,640.90 = 170,721.20/x
  3. Step 3: Cross multiply
    271,760.60x = 407,640.90 × 170,721.20
  4. Step 4: Simplify right side
    271,760.60x = 69,592,943,617.08
  5. Step 5: Solve for x
    x = 69,592,943,617.08/271,760.60
  6. Step 6: Final answer
    x = 256,081.80

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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.