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Finding the Fourth Proportional to 613,411.79, 920,201.51 and 213,992.69

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Solution

The fourth proportional to 613,411.79, 920,201.51 and 213,992.69 is: 321,018.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,411.79 : 920,201.51 = 213,992.69 : x
  2. Step 2: Convert to fraction form
    613,411.79/920,201.51 = 213,992.69/x
  3. Step 3: Cross multiply
    613,411.79x = 920,201.51 × 213,992.69
  4. Step 4: Simplify right side
    613,411.79x = 196,916,392,400.94
  5. Step 5: Solve for x
    x = 196,916,392,400.94/613,411.79
  6. Step 6: Final answer
    x = 321,018.27

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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.