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Finding the Fourth Proportional to 311,686.93, 430,128.09 and 177,550.93

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Solution

The fourth proportional to 311,686.93, 430,128.09 and 177,550.93 is: 245,020.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,686.93 : 430,128.09 = 177,550.93 : x
  2. Step 2: Convert to fraction form
    311,686.93/430,128.09 = 177,550.93/x
  3. Step 3: Cross multiply
    311,686.93x = 430,128.09 × 177,550.93
  4. Step 4: Simplify right side
    311,686.93x = 76,369,642,398.62
  5. Step 5: Solve for x
    x = 76,369,642,398.62/311,686.93
  6. Step 6: Final answer
    x = 245,020.36

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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.