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Finding the Fourth Proportional to 638,118.90, 957,005.55 and 188,838.90

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Solution

The fourth proportional to 638,118.90, 957,005.55 and 188,838.90 is: 283,207.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,118.90 : 957,005.55 = 188,838.90 : x
  2. Step 2: Convert to fraction form
    638,118.90/957,005.55 = 188,838.90/x
  3. Step 3: Cross multiply
    638,118.90x = 957,005.55 × 188,838.90
  4. Step 4: Simplify right side
    638,118.90x = 180,719,875,355.90
  5. Step 5: Solve for x
    x = 180,719,875,355.90/638,118.90
  6. Step 6: Final answer
    x = 283,207.21

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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.