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Finding the Fourth Proportional to 320,720.91, 442,588.52 and 177,480.91

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Solution

The fourth proportional to 320,720.91, 442,588.52 and 177,480.91 is: 244,920.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,720.91 : 442,588.52 = 177,480.91 : x
  2. Step 2: Convert to fraction form
    320,720.91/442,588.52 = 177,480.91/x
  3. Step 3: Cross multiply
    320,720.91x = 442,588.52 × 177,480.91
  4. Step 4: Simplify right side
    320,720.91x = 78,551,013,285.15
  5. Step 5: Solve for x
    x = 78,551,013,285.15/320,720.91
  6. Step 6: Final answer
    x = 244,920.15

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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.