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Finding the Fourth Proportional to 213,657.28, 320,259.93 and 80,479.92

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Solution

The fourth proportional to 213,657.28, 320,259.93 and 80,479.92 is: 120,634.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,657.28 : 320,259.93 = 80,479.92 : x
  2. Step 2: Convert to fraction form
    213,657.28/320,259.93 = 80,479.92/x
  3. Step 3: Cross multiply
    213,657.28x = 320,259.93 × 80,479.92
  4. Step 4: Simplify right side
    213,657.28x = 25,774,493,545.61
  5. Step 5: Solve for x
    x = 25,774,493,545.61/213,657.28
  6. Step 6: Final answer
    x = 120,634.75

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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.