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Finding the Fourth Proportional to 312,086.79, 430,672.37 and 176,117.13

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Solution

The fourth proportional to 312,086.79, 430,672.37 and 176,117.13 is: 243,037.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,086.79 : 430,672.37 = 176,117.13 : x
  2. Step 2: Convert to fraction form
    312,086.79/430,672.37 = 176,117.13/x
  3. Step 3: Cross multiply
    312,086.79x = 430,672.37 × 176,117.13
  4. Step 4: Simplify right side
    312,086.79x = 75,848,780,894.11
  5. Step 5: Solve for x
    x = 75,848,780,894.11/312,086.79
  6. Step 6: Final answer
    x = 243,037.46

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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.