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Finding the Fourth Proportional to 312,471.58, 431,237.31 and 176,530.45

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Solution

The fourth proportional to 312,471.58, 431,237.31 and 176,530.45 is: 243,627.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,471.58 : 431,237.31 = 176,530.45 : x
  2. Step 2: Convert to fraction form
    312,471.58/431,237.31 = 176,530.45/x
  3. Step 3: Cross multiply
    312,471.58x = 431,237.31 × 176,530.45
  4. Step 4: Simplify right side
    312,471.58x = 76,126,516,391.09
  5. Step 5: Solve for x
    x = 76,126,516,391.09/312,471.58
  6. Step 6: Final answer
    x = 243,627.01

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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.