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Finding the Fourth Proportional to 447,138.64, 670,707.87 and 260,018.92

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Solution

The fourth proportional to 447,138.64, 670,707.87 and 260,018.92 is: 390,028.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,138.64 : 670,707.87 = 260,018.92 : x
  2. Step 2: Convert to fraction form
    447,138.64/670,707.87 = 260,018.92/x
  3. Step 3: Cross multiply
    447,138.64x = 670,707.87 × 260,018.92
  4. Step 4: Simplify right side
    447,138.64x = 174,396,735,992.90
  5. Step 5: Solve for x
    x = 174,396,735,992.90/447,138.64
  6. Step 6: Final answer
    x = 390,028.33

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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.