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Finding the Fourth Proportional to 371,221.70, 512,286.32 and 201,455.83

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Solution

The fourth proportional to 371,221.70, 512,286.32 and 201,455.83 is: 278,009.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,221.70 : 512,286.32 = 201,455.83 : x
  2. Step 2: Convert to fraction form
    371,221.70/512,286.32 = 201,455.83/x
  3. Step 3: Cross multiply
    371,221.70x = 512,286.32 × 201,455.83
  4. Step 4: Simplify right side
    371,221.70x = 103,203,065,793.25
  5. Step 5: Solve for x
    x = 103,203,065,793.25/371,221.70
  6. Step 6: Final answer
    x = 278,009.25

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1.5x scale

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.