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Finding the Fourth Proportional to 402,440.59, 555,380.92 and 221,169.27

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Solution

The fourth proportional to 402,440.59, 555,380.92 and 221,169.27 is: 305,220.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,440.59 : 555,380.92 = 221,169.27 : x
  2. Step 2: Convert to fraction form
    402,440.59/555,380.92 = 221,169.27/x
  3. Step 3: Cross multiply
    402,440.59x = 555,380.92 × 221,169.27
  4. Step 4: Simplify right side
    402,440.59x = 122,833,192,648.33
  5. Step 5: Solve for x
    x = 122,833,192,648.33/402,440.59
  6. Step 6: Final answer
    x = 305,220.69

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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.