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Finding the Fourth Proportional to 312,889.02, 431,760.15 and 176,916.30

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Solution

The fourth proportional to 312,889.02, 431,760.15 and 176,916.30 is: 244,129.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,889.02 : 431,760.15 = 176,916.30 : x
  2. Step 2: Convert to fraction form
    312,889.02/431,760.15 = 176,916.30/x
  3. Step 3: Cross multiply
    312,889.02x = 431,760.15 × 176,916.30
  4. Step 4: Simplify right side
    312,889.02x = 76,385,408,225.45
  5. Step 5: Solve for x
    x = 76,385,408,225.45/312,889.02
  6. Step 6: Final answer
    x = 244,129.40

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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.