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Finding the Fourth Proportional to 402,481.44, 555,397.46 and 221,189.46

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Solution

The fourth proportional to 402,481.44, 555,397.46 and 221,189.46 is: 305,226.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,481.44 : 555,397.46 = 221,189.46 : x
  2. Step 2: Convert to fraction form
    402,481.44/555,397.46 = 221,189.46/x
  3. Step 3: Cross multiply
    402,481.44x = 555,397.46 × 221,189.46
  4. Step 4: Simplify right side
    402,481.44x = 122,848,064,262.77
  5. Step 5: Solve for x
    x = 122,848,064,262.77/402,481.44
  6. Step 6: Final answer
    x = 305,226.66

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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.