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Finding the Fourth Proportional to 220,981.20, 331,081.40 and 213,672.40

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Solution

The fourth proportional to 220,981.20, 331,081.40 and 213,672.40 is: 320,131.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,981.20 : 331,081.40 = 213,672.40 : x
  2. Step 2: Convert to fraction form
    220,981.20/331,081.40 = 213,672.40/x
  3. Step 3: Cross multiply
    220,981.20x = 331,081.40 × 213,672.40
  4. Step 4: Simplify right side
    220,981.20x = 70,742,957,333.36
  5. Step 5: Solve for x
    x = 70,742,957,333.36/220,981.20
  6. Step 6: Final answer
    x = 320,131.11

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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.