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Finding the Fourth Proportional to 638,858.14, 957,340.51 and 259,317.05

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Solution

The fourth proportional to 638,858.14, 957,340.51 and 259,317.05 is: 388,591.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,858.14 : 957,340.51 = 259,317.05 : x
  2. Step 2: Convert to fraction form
    638,858.14/957,340.51 = 259,317.05/x
  3. Step 3: Cross multiply
    638,858.14x = 957,340.51 × 259,317.05
  4. Step 4: Simplify right side
    638,858.14x = 248,254,711,463.70
  5. Step 5: Solve for x
    x = 248,254,711,463.70/638,858.14
  6. Step 6: Final answer
    x = 388,591.30

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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.