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Finding the Fourth Proportional to 402,761.64, 555,792.02 and 221,481.24

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Solution

The fourth proportional to 402,761.64, 555,792.02 and 221,481.24 is: 305,633.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,761.64 : 555,792.02 = 221,481.24 : x
  2. Step 2: Convert to fraction form
    402,761.64/555,792.02 = 221,481.24/x
  3. Step 3: Cross multiply
    402,761.64x = 555,792.02 × 221,481.24
  4. Step 4: Simplify right side
    402,761.64x = 123,097,505,771.71
  5. Step 5: Solve for x
    x = 123,097,505,771.71/402,761.64
  6. Step 6: Final answer
    x = 305,633.64

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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.