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Finding the Fourth Proportional to 247,388.79, 341,386.05 and 139,960.65

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Solution

The fourth proportional to 247,388.79, 341,386.05 and 139,960.65 is: 193,139.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,388.79 : 341,386.05 = 139,960.65 : x
  2. Step 2: Convert to fraction form
    247,388.79/341,386.05 = 139,960.65/x
  3. Step 3: Cross multiply
    247,388.79x = 341,386.05 × 139,960.65
  4. Step 4: Simplify right side
    247,388.79x = 47,780,613,458.93
  5. Step 5: Solve for x
    x = 47,780,613,458.93/247,388.79
  6. Step 6: Final answer
    x = 193,139.77

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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.