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Finding the Fourth Proportional to 313,176.78, 432,258.12 and 185,925.78

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Solution

The fourth proportional to 313,176.78, 432,258.12 and 185,925.78 is: 256,621.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,176.78 : 432,258.12 = 185,925.78 : x
  2. Step 2: Convert to fraction form
    313,176.78/432,258.12 = 185,925.78/x
  3. Step 3: Cross multiply
    313,176.78x = 432,258.12 × 185,925.78
  4. Step 4: Simplify right side
    313,176.78x = 80,367,928,122.33
  5. Step 5: Solve for x
    x = 80,367,928,122.33/313,176.78
  6. Step 6: Final answer
    x = 256,621.61

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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.