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Finding the Fourth Proportional to 521,060.22, 718,834.86 and 306,103.32

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Solution

The fourth proportional to 521,060.22, 718,834.86 and 306,103.32 is: 422,288.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,060.22 : 718,834.86 = 306,103.32 : x
  2. Step 2: Convert to fraction form
    521,060.22/718,834.86 = 306,103.32/x
  3. Step 3: Cross multiply
    521,060.22x = 718,834.86 × 306,103.32
  4. Step 4: Simplify right side
    521,060.22x = 220,037,737,177.74
  5. Step 5: Solve for x
    x = 220,037,737,177.74/521,060.22
  6. Step 6: Final answer
    x = 422,288.50

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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.