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Finding the Fourth Proportional to 402,609.38, 555,600.75 and 221,333

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Solution

The fourth proportional to 402,609.38, 555,600.75 and 221,333 is: 305,439.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,609.38 : 555,600.75 = 221,333 : x
  2. Step 2: Convert to fraction form
    402,609.38/555,600.75 = 221,333/x
  3. Step 3: Cross multiply
    402,609.38x = 555,600.75 × 221,333
  4. Step 4: Simplify right side
    402,609.38x = 122,972,780,799.75
  5. Step 5: Solve for x
    x = 122,972,780,799.75/402,609.38
  6. Step 6: Final answer
    x = 305,439.43

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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.