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Finding the Fourth Proportional to 661,756.34, 992,150.57 and 212,221.32

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Solution

The fourth proportional to 661,756.34, 992,150.57 and 212,221.32 is: 318,176.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,756.34 : 992,150.57 = 212,221.32 : x
  2. Step 2: Convert to fraction form
    661,756.34/992,150.57 = 212,221.32/x
  3. Step 3: Cross multiply
    661,756.34x = 992,150.57 × 212,221.32
  4. Step 4: Simplify right side
    661,756.34x = 210,555,503,604.15
  5. Step 5: Solve for x
    x = 210,555,503,604.15/661,756.34
  6. Step 6: Final answer
    x = 318,176.78

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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.