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Finding the Fourth Proportional to 638,609.76, 958,055.58 and 189,366.48

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Solution

The fourth proportional to 638,609.76, 958,055.58 and 189,366.48 is: 284,091.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,609.76 : 958,055.58 = 189,366.48 : x
  2. Step 2: Convert to fraction form
    638,609.76/958,055.58 = 189,366.48/x
  3. Step 3: Cross multiply
    638,609.76x = 958,055.58 × 189,366.48
  4. Step 4: Simplify right side
    638,609.76x = 181,423,612,828.96
  5. Step 5: Solve for x
    x = 181,423,612,828.96/638,609.76
  6. Step 6: Final answer
    x = 284,091.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.