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Finding the Fourth Proportional to 478,992.92, 661,005.38 and 261,201.06

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Solution

The fourth proportional to 478,992.92, 661,005.38 and 261,201.06 is: 360,454.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,992.92 : 661,005.38 = 261,201.06 : x
  2. Step 2: Convert to fraction form
    478,992.92/661,005.38 = 261,201.06/x
  3. Step 3: Cross multiply
    478,992.92x = 661,005.38 × 261,201.06
  4. Step 4: Simplify right side
    478,992.92x = 172,655,305,921.70
  5. Step 5: Solve for x
    x = 172,655,305,921.70/478,992.92
  6. Step 6: Final answer
    x = 360,454.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.