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Finding the Fourth Proportional to 403,674.10, 605,511.15 and 279,258.10

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Solution

The fourth proportional to 403,674.10, 605,511.15 and 279,258.10 is: 418,887.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,674.10 : 605,511.15 = 279,258.10 : x
  2. Step 2: Convert to fraction form
    403,674.10/605,511.15 = 279,258.10/x
  3. Step 3: Cross multiply
    403,674.10x = 605,511.15 × 279,258.10
  4. Step 4: Simplify right side
    403,674.10x = 169,093,893,277.82
  5. Step 5: Solve for x
    x = 169,093,893,277.82/403,674.10
  6. Step 6: Final answer
    x = 418,887.15

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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.