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Finding the Fourth Proportional to 220,856.40, 331,284.60 and 121,323.60

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Solution

The fourth proportional to 220,856.40, 331,284.60 and 121,323.60 is: 181,985.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,856.40 : 331,284.60 = 121,323.60 : x
  2. Step 2: Convert to fraction form
    220,856.40/331,284.60 = 121,323.60/x
  3. Step 3: Cross multiply
    220,856.40x = 331,284.60 × 121,323.60
  4. Step 4: Simplify right side
    220,856.40x = 40,192,640,296.56
  5. Step 5: Solve for x
    x = 40,192,640,296.56/220,856.40
  6. Step 6: Final answer
    x = 181,985.40

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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.